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Understanding Your Transmission Components: A Comprehensive Overview

Understanding Your Transmission Components

A vehicle’s transmission system plays a critical role in delivering power from the engine to the wheels, enabling the vehicle to move and change speeds smoothly. In this article, we will provide an overview of the various transmission systems, their components, and their functions.

Understanding Manual Transmissions

Manual transmissions, also known as stick shifts, provide a more engaged driving experience as the driver is responsible for manually changing gears. In this article, we will delve into the inner workings of a manual transmission, exploring its key components and their functions.

  • Clutch: The clutch is the primary component that allows the driver to disengage and engage the engine from the transmission while shifting gears. The clutch assembly consists of several parts, such as the pressure plate, clutch disc, and flywheel. When the clutch pedal is pressed, the clutch disc disengages from the flywheel, allowing the driver to change gears. Releasing the pedal reconnects the clutch disc to the flywheel, transferring power back to the transmission.
  • Gear Shift Lever: The gear shift lever is the driver’s interface for selecting the desired gear ratio. By moving the lever, the driver engages various gear sets within the gearbox to change the transmission’s output speed.
  • Gearbox: The gearbox houses different sets of gears that provide various gear ratios. These ratios determine how many times the input shaft (connected to the engine) must rotate for the output shaft (connected to the wheels) to complete one rotation. Lower gears provide higher torque for acceleration, while higher gears offer lower torque but better fuel efficiency at cruising speeds.
  • Synchronizers: Synchronizers are essential components that help match the speeds of the input and output shafts during gear shifts. This ensures smooth gear engagement and prevents grinding or clashing of gears.
  • Linkage: The linkage system connects the gear shift lever to the transmission, transmitting the driver’s input to the gearbox.

Reverse Gear: The reverse gear is a unique gear set that changes the rotation direction of the output shaft, allowing the vehicle to move backward.

In a manual transmission, the driver must carefully balance clutch engagement and throttle input to ensure smooth gear shifts and avoid stalling the engine. Mastery of this skill set is often seen as a rite of passage for many driving enthusiasts. 

Exploring Automatic Transmissions

Automatic transmissions offer a more convenient driving experience by automatically shifting gears based on the vehicle’s speed and engine load. 

  • Torque Converter: The torque converter replaces the clutch in automatic transmissions, acting as a fluid coupling between the engine and transmission. It transfers power from the engine to the transmission using hydraulic fluid, allowing for smooth gear shifts and eliminating the need for a clutch pedal.
  • Planetary Gear Sets: Automatic transmissions use a series of planetary gear sets to achieve different gear ratios. These gear sets consist of a central sun gear, planet gears, and an outer ring gear, all working together to vary the transmission output speed.
  • Hydraulic System: The hydraulic system uses pressurized fluid to control the operation of clutches and bands, which in turn engage and disengage planetary gear sets. It also provides lubrication and cooling for the transmission.
  • Valve Body: The valve body is the control center of the hydraulic system, directing fluid flow to engage the appropriate gear sets based on driving conditions and electronic signals from the vehicle’s sensors.
  • Electronic Controls: Modern automatic transmissions use electronic controls and sensors to optimize gear shifts for improved performance, fuel efficiency, and driving comfort.

The Clutch: Function and Components

The clutch is a vital component in manual transmissions, responsible for connecting and disconnecting the engine from the transmission during gear shifts. It enables smooth gear changes and prevents damage to the gearbox. The clutch assembly consists of the pressure plate, clutch disc, and flywheel. When the driver presses the clutch pedal, the pressure plate disengages the clutch disc from the flywheel, allowing for gear shifts. As the pedal is released, the clutch disc re-engages with the flywheel, transferring engine power back to the transmission. Understanding the clutch’s operation and components is crucial for mastering manual transmissions and ensuring their longevity.

The Gearbox: Gear Ratios and Synchronizers

The gearbox is the heart of a transmission system, housing various gear sets that provide different gear ratios. These ratios determine the balance between torque and speed, allowing the vehicle to accelerate, maintain cruising speeds, and climb inclines efficiently. In manual transmissions, synchronizers are essential components that help match the speeds of the input and output shafts during gear shifts. This ensures smooth gear engagement and prevents grinding or clashing of gears. A well-maintained gearbox contributes significantly to a vehicle’s performance, fuel efficiency, and overall driving experience.

The Torque Converter: Role and Operation

The torque converter is a key component in automatic transmissions, serving as a fluid coupling between the engine and transmission. It replaces the clutch found in manual systems, allowing for seamless gear changes without driver intervention. The torque converter consists of three main elements: the impeller, turbine, and stator. As the engine spins the impeller, it transfers hydraulic fluid to the turbine, causing it to rotate and transmit power to the transmission. The stator redirects fluid flow between the impeller and turbine, maximizing torque transfer efficiency. A thorough understanding of the torque converter’s function is essential for comprehending automatic transmission operation and maintenance.

Transmission Fluids: Types and Maintenance

Transmission fluids lubricate, cool, and protect transmission components, ensuring smooth operation and longevity. Different transmissions require specific fluid types, such as automatic transmission fluid (ATF) or manual transmission fluid (MTF). Regular fluid checks and changes, as per the manufacturer’s guidelines, are crucial to prevent transmission issues and prolong its life.

Drivetrain Components: Driveshaft, Axle, and Differential

The drivetrain transfers power from the transmission to the wheels, enabling the vehicle to move. Key components include the driveshaft, which transmits torque from the transmission to the differential, the axle, which connects the wheels to the differential, and the differential itself, which distributes torque between the wheels, allowing them to rotate at different speeds during turns. A thorough understanding of these components is essential for maintaining and troubleshooting your vehicle’s transmission system.

Electronic Transmission Controls and Sensors

Modern transmission systems incorporate electronic controls and sensors to optimize gear shifts, enhance performance, and improve fuel efficiency. These components work in tandem with the vehicle’s Engine Control Unit (ECU) to monitor driving conditions and make real-time adjustments. Key sensors include speed sensors, throttle position sensors, and transmission fluid temperature sensors. By understanding the role of these electronic controls and sensors, drivers and technicians can better diagnose and address transmission-related issues.

Common Transmission Problems and Solutions

There can be numerous transmission problems that can affect the performance and functionality of a vehicle. Some common transmission problems include:

  • Slipping gears
  • Grinding or clashing noises during gear shifts
  • Difficulty shifting gears
  • Leaking transmission fluid
  • Overheating transmission
  • Delayed engagement or slow response in gear changes
  • Transmission warning light on the dashboard
  • Loss of power or poor acceleration
  • Erratic or harsh shifts
  • Complete transmission failure

Regular maintenance, such as checking transmission fluid levels and conditions, can help prevent many of these issues. However, some problems may arise from wear and tear or manufacturing defects, requiring professional diagnosis and repair.

Transmission Maintenance and Troubleshooting

Proper maintenance and troubleshooting are essential for transmission longevity. The best way to maintain a performance transmission involves the following:

  • Regular fluid checks and changes
  • Inspecting and adjusting linkage
  • Identifying common issues, such as slipping, grinding, or leaks
  • Consulting a professional for diagnosis and repair
  • Following manufacturer-recommended maintenance schedules

Upgrading and Modifying Transmission Systems

Are you looking to upgrade your vehicle’s performance and unlock its full potential? Modifying your transmission system can make a significant difference in your driving experience.

Imagine tackling challenging terrain or effortlessly accelerating on the open road, all thanks to a customized transmission tailored to your specific needs. Performance transmissions offer enhanced durability, quicker gear shifts, and improved torque transfer, giving you the edge you desire on the road or track.

Gearstar is a leading provider of performance transmissions, specializing in building custom solutions for a wide range of vehicles. Our expert technicians will carefully assess your needs and craft a transmission that delivers the power and performance you’ve been dreaming of.

Don’t wait to experience the thrilling transformation a performance transmission can bring to your vehicle. Contact Gearstar today to discuss your options and let our team of experts guide you through the process of upgrading your transmission system. Together, we’ll elevate your driving experience to new heights.

How to Restore a Muscle Car with an Upgraded Transmission

MANUAL TRANSMISSION VS AUTOMATIC TRANSMISSION | WHICH ONE TO CHOOSE?

Muscle cars are iconic symbols of American automotive culture, known for their powerful engines, sleek designs, and impressive performance capabilities. These high-performance vehicles were first introduced in the 1960s and 1970s, and they continue to captivate car enthusiasts to this day. If you’re lucky enough to own a classic muscle car or want to restore a muscle car, you know that every component matters when it comes to performance.

One of the most critical components of any muscle car is the transmission. A muscle car’s engine produces a lot of power, and that power needs to be transferred to the wheels effectively. Upgrading your transmission is a critical step in restoring a muscle car, as it can significantly improve performance and help you get the most out of your engine. In this blog post, we’ll explore the basics of muscle cars and why they’re so popular, as well as explain the importance of an upgraded transmission when restoring a muscle car.

Choosing the Right Upgraded Transmission

Restoring a muscle car can be an exciting and rewarding project, but choosing the right upgraded transmission is crucial to ensure its peak performance. The transmission plays a vital role in transmitting power from the engine to the wheels, making it essential to select the right transmission for your muscle car restoration project.

When selecting an upgraded transmission for your muscle car, it’s crucial to consider factors such as your car’s engine size, the type of driving you plan to do, and the overall performance goals you have for your vehicle. For example, a high-performance drag racing transmission may not be suitable for a daily driver muscle car.

Fortunately, there are several different types of upgraded transmissions available for muscle cars, ranging from manual transmissions to automatic transmissions. Each type of transmission has its unique advantages and disadvantages, making it essential to research and select the best option for your specific needs. A professional transmission specialist can help you choose the best option based on your muscle car’s unique characteristics and performance goals.

Ultimately, choosing the right upgraded transmission is critical to ensure your muscle car restoration project’s success. By carefully considering your needs and goals, you can select the best transmission to help you achieve the peak performance and driving experience you desire from your restored muscle car.

Steps for Restoring a Muscle Car with an Upgraded Transmission

Restoring a muscle car can be a rewarding but challenging process. When upgrading to a new transmission, it’s important to follow the right steps to ensure that the process goes smoothly. Here are the steps to consider:

  1. Planning and preparation: Before starting the restoration process, it’s important to plan and prepare. This includes researching the right upgraded transmission for the make and model of the muscle car, setting a budget, and creating a timeline for the restoration process.
  2. 2. Removing the old transmission: The first step in installing an upgraded transmission is to remove the old one. This involves draining the fluids, disconnecting the transmission from the engine and driveshaft, and removing it from the car.
  3. Preparing the car for the new transmission: Once the old transmission is removed, it’s important to prepare the car for the new one. This includes cleaning the transmission mounting area, inspecting the engine and driveshaft, and making any necessary repairs.
  4. Installing the upgraded transmission: With the car and new transmission prepped, it’s time to install the new transmission. This involves aligning the transmission with the engine and driveshaft, connecting the transmission to the engine, and filling the transmission with fluids.
  5. Additional upgrades to consider when restoring a muscle car: While upgrading to an upgraded transmission can significantly improve the performance of a muscle car, there are other upgrades to consider. This includes upgrading the suspension, brakes, exhaust, and engine components to further enhance the car’s performance and overall driving experience.

Benefits of an Upgraded Transmission for a Restored Muscle Car

When restoring a muscle car, upgrading the transmission can greatly enhance its overall performance and power. An upgraded transmission can handle the increased horsepower and torque produced by the engine, allowing for quicker acceleration and faster speeds. Additionally, an upgraded transmission can provide improved shifting, allowing for a smoother and more responsive driving experience.

In addition to performance benefits, an upgraded transmission can also increase the reliability and durability of the vehicle. The new transmission can be designed with stronger components, reducing the risk of failure and extending the lifespan of the vehicle. This is especially important for muscle cars, as many of them are several decades old and may have worn or damaged transmissions.

Overall, an upgraded transmission can greatly enhance the driving experience and performance of a restored muscle car, making it a worthwhile investment for any car enthusiast.

Maintaining Your Restored Muscle Car with an Upgraded Transmission

Maintaining a restored muscle car with an upgraded transmission is essential to ensure that the car runs smoothly and efficiently. Regular maintenance and upkeep are crucial in keeping the car in top condition, especially if you want to enjoy it for years to come. Neglecting to maintain your vehicle can lead to costly repairs and reduced performance.

To maintain your muscle car with an upgraded transmission, there are a few tips you should keep in mind. First and foremost, make sure you follow the recommended maintenance schedule for your vehicle. This will include routine maintenance such as oil changes, fluid checks, and inspections of the transmission and other critical components. Keeping up with these maintenance tasks will help prevent major problems down the road.

Another important tip for maintaining a muscle car with an upgraded transmission is to take care when driving. While an upgraded transmission can improve performance, it’s important not to push the car too hard or drive recklessly. This can cause excess wear and tear on the transmission, leading to problems and costly repairs.

Finally, make sure to choose a qualified mechanic who specializes in working with muscle cars and upgraded transmissions. They will have the expertise and knowledge to properly maintain and repair your vehicle, ensuring that it runs smoothly for years to come.

Conclusion

Restoring a muscle car is a rewarding experience that requires a lot of time and effort. One of the key components that can greatly impact the performance of a restored muscle car is the transmission. In this blog post, we have discussed the importance of choosing the right upgraded transmission when restoring a muscle car.

A muscle car is a high-performance vehicle that is designed for power and speed. These cars are incredibly popular due to their unique design and impressive performance capabilities. However, when restoring a muscle car, it is important to consider upgrading the transmission in order to maximize its performance.

Choosing the right upgraded transmission is crucial when restoring a muscle car. There are several factors to consider when selecting an upgraded transmission, including the make and model of the vehicle, the engine size, and the intended use of the car. There are also several different types of upgraded transmissions available, each with its own set of benefits and drawbacks.

The process of restoring a muscle car with an upgraded transmission involves careful planning and preparation. This includes removing the old transmission, preparing the car for the new transmission, and installing the upgraded transmission. Additional upgrades, such as a new exhaust system or suspension upgrades, can also be considered to further enhance the performance of the car.

Upgrading the transmission of a restored muscle car can provide several benefits, including improved performance and power, increased reliability and durability, and an enhanced driving experience. It is important to regularly maintain and upkeep a muscle car with an upgraded transmission in order to ensure that it continues to perform at its best.

 

An Overview of The Different Levels of An Upgraded Transmission

A high-performance transmission is essential to any vehicle designed to deliver top-notch performance. The transmission transfers power from the engine to the wheels, accelerating the vehicle smoothly and efficiently. Without a high-performance transmission, a vehicle’s engine power may not be effectively transmitted to the wheels, resulting in sluggish acceleration, reduced fuel efficiency, and increased wear and tear on the engine. Many car owners seek to upgrade their transmissions to achieve optimal performance. This article will provide an overview of the different levels of upgraded transmission, explaining each level’s benefits and helping readers choose the right upgrade level for their vehicle.

Upgraded Transmission: Level 2

Level 2 upgrades build upon the foundation set by Level 1 upgrades, offering more significant enhancements to a vehicle’s transmission. These upgrades typically involve adding stronger gears or a performance shift kit to increase the transmission’s power-handling capacity and improve shifting speed and accuracy. Upgrading the transmission cooler is another ordinary Level 2 upgrade, as it helps to keep the transmission operating at a safe temperature, particularly in high-stress driving situations.

One of the main benefits of Level 2 upgrades is improved performance and durability under more demanding conditions. By adding stronger gears or a performance shift kit, drivers can push their vehicle’s transmission to its limits without fear of failure or excessive wear and tear. Upgrading the transmission cooler can help to prevent overheating and fluid breakdown, ensuring the transmission operates reliably even in extreme heat or high-stress driving situations.

For example, adding a performance shift kit to a Chevrolet Corvette can help to improve the car’s acceleration and responsiveness, making it a more engaging and fun driving experience. Similarly, upgrading the transmission cooler on a Jeep Wrangler can help to prevent overheating when off-roading in hot and dusty environments. Regardless of the vehicle, Level 2 upgrades can provide significant performance, durability, and reliability benefits. Standard vehicles that can benefit from Level 2 upgrades include high-performance sports cars, off-road vehicles, and vehicles for racing or towing heavy loads.

Upgraded Transmission: Level 3

Level 3 upgrades represent the highest transmission upgrades, providing the most significant enhancements to a vehicle’s performance and power-handling capabilities. These upgrades typically involve heavy-duty components like billet shafts, servos, or sprags, which can withstand much higher levels of torque and power than the stock components. Custom tuning is also often necessary to optimize the performance of the upgraded transmission.

One of the main benefits of Level 3 upgrades is the ability to handle extremely high levels of power and torque, making them ideal for high-performance vehicles, drag racing, or other extreme driving situations. Level 3 upgrades can also improve shift speed and accuracy, providing a more engaging and precise driving experience. With heavy-duty components and custom tuning, drivers can unleash the full potential of their engines without fear of transmission failure or damage.

Typical vehicles that can benefit from Level 3 upgrades include high-performance sports cars, drag racing vehicles, and trucks used for towing or heavy hauling. For example, upgrading the transmission in a Ford Mustang GT with heavy-duty billet components and custom tuning can help the car handle much higher levels of power and torque, resulting in improved acceleration and top speed. Similarly, upgrading the transmission in a Dodge Ram truck used for towing heavy loads can help to prevent transmission failure and ensure reliable performance under extreme stress.

Level 3 upgrades represent the highest transmission upgrades, providing significant benefits in power handling, durability, and performance. These upgrades are typically reserved for high-performance vehicles or those used in extreme driving situations and require heavy-duty components and custom tuning to optimize their performance.

Upgraded Transmission: Level 4

Level 4 upgrades are the most comprehensive and extensive modifications that can be made to a transmission. These upgrades involve a complete overhaul of the transmission with high-performance components and custom tuning to optimize the performance of the upgraded transmission. Level 4 upgrades are typically reserved for extreme driving situations or high-performance racing vehicles, where maximum power and performance are required.

The benefits of Level 4 upgrade transmissions are significant, providing the highest power handling and performance available. The upgraded transmission can also improve shift speed, accuracy, and response time, resulting in a more engaging and precise driving experience. With a complete overhaul and high-performance components, drivers can unleash the full potential of their engines without fear of transmission failure or damage.

Standard vehicles that can benefit from Level 4 upgrades include high-performance racing vehicles, off-road trucks used for extreme driving, and vehicles used for professional motorsports. For example, upgrading the transmission in a drag racing car with a complete overhaul and high-performance components can provide unmatched power handling capabilities, resulting in faster acceleration and higher top speeds. Similarly, upgrading the transmission in an off-road truck used for extreme rock crawling or mudding can provide the durability and power necessary to navigate rugged terrain without damaging the transmission.

Level 4 upgrades represent the highest level of transmission upgrades, providing the most extensive modifications available for extreme power and performance. These upgrades are typically reserved for extreme driving situations or high-performance racing vehicles. They require a complete transmission overhaul with high-performance components and custom tuning to optimize performance.

Choosing the Right Upgrade Level

Choosing the right level of transmission upgrade for your vehicle can be challenging. It would be best if you considered several factors when deciding which level of upgrade is suitable for your vehicle, such as your budget, driving habits, and plans for your vehicle.

Your budget is one of the most important factors when choosing a transmission upgrade. Upgrades can range in price from a few hundred dollars to several thousand dollars, depending on the level of upgrade and the specific components being used. Setting and sticking to a budget to avoid overspending or unnecessary upgrades is essential.

Your driving habits are also an essential consideration when choosing a transmission upgrade. If you use your vehicle for daily commuting or light-duty driving, a Level 1 or Level 2 upgrade may be sufficient to meet your needs. However, suppose you frequently tow heavy loads or participate in extreme driving situations. A Level 3 or Level 4 upgrade may be necessary to ensure your transmission can handle the additional power and stress.

Finally, it’s essential to consider your plans for your vehicle. Plan to keep your vehicle for an extended period or participate in professional motorsports. A Level 3 or Level 4 upgrade may be the best choice for maximum durability and performance. However, if you plan to sell or trade-in your vehicle shortly, a Level 1 or Level 2 upgrade may be sufficient to improve its performance and value.

Choosing the right level of transmission upgrade for your vehicle requires careful consideration of several factors, including your budget, driving habits, and plans for your vehicle. By assessing your needs and choosing the appropriate upgrade level, you can improve your vehicle’s performance and durability while avoiding overspending or unnecessary upgrades.

Conclusion

Upgrading the transmission can significantly enhance the overall performance of a vehicle. With the right upgrade, you can experience smoother shifting, enhanced acceleration, and improved transmission durability. Each upgrade level provides distinct benefits, from replacing worn-out components in Level 1 to comprehensive overhauls with high-performance parts in Level 4. When deciding on the appropriate upgrade level, it is essential to consider various factors such as driving habits, budget, and plans for the vehicle. We strongly recommend exploring all the available options and consulting with a professional to determine the optimal upgrade for your specific requirements.

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Transmission Control Module: Buyer’s Guide for Classic Cars

Transmission Control Module: Buyer's Guide for Classic Cars - Gearstar

An advanced, late-model electronic transmission and transmission control module can enhance the performance of classic cars. These controllers offer precise shift point revolutions per minute and can adjust line pressure for shift firmness. They are not a universal remedy for weak transmissions but can enhance the automotive experience when the electronic automatic transmission is functioning properly. Some solutions provide dyno mode and block the torque converter clutch to prevent slippage.

The Products Currently on the Market

The market currently offers a variety of high-performance transmission control modules from major brands with unique features and solutions. Selection depends on the specific functions required, with some requiring laptop tuning for advanced users and others not. Some helpful categories for selection include LED diagnostics, A/B Shift, and Speedo Output. Simplicity in design is a desirable feature, with some controllers using dials instead of digital inputs and others being smaller in size. Newer control products offer upgraded features and improved performance, such as the TCU 2.0 system with diagnostic LED indicators and robust software.

Edelbrock’s Autonomous Controller

Mentioning Edelbrock’s autonomous controller that can easily be controlled using a wireless Android tablet as the input component instead of a device attached to a cable is not out of line. The stand-alone trans controller makes use of practically the same software and circuitry for its popular ProFlo-4 EFI system. The trans controller promises to deliver the same incredibly sound engineering that Edelbrock’s ProFlo-4 EFI system offers.

The HGM Electronics Compu-Shift

According to experts, the HGM Electronics Compu-Shift is one of the most reliable and durable systems to consider. In a recent improvement move to sharpen its deliverables, HGM engineers completely re-designed its path-breaking CompuShift II controller by placing the electronics in a more compact package called the HGM Sport.

The HGM also brought down the total cost of the entire system by making use of Bluetooth technology to load a free program into iPad or iPhone devices and Android tablets and phones. As a result, your tablet or smartphone becomes the handheld screen when using HGM Sport.

This enables you to keep track of the system’s current state and make necessary changes to its settings as desired. This frees you from the standard expenditure of buying and using a separate monitor and significantly reduces the cost of the entire system.

Transmissions and Suitable Products They Work With

Most TCMs only function on a carbureted engine as long as a throttle position sensor (TPS) is attached to the carburetor. HGM sells Acculink, an excellent conversion kit that helps install a standard 3-pin GM sensor on various carburetors from Holley, Edelbrock, or Q-jet. Holley also sells a great conversion kit, though it is only suitable for electric choke-equipped 4160.4150 carburetors that come with an electrical throttle.

The likelihood that few owners of high-performance-oriented vehicles may want to integrate an electronic fuel injection system with an electronically-operated transmission is high. For instance, FiTech integrates transmission control into specific EFI systems, e.g., the Ultimate LS1/LS2/LS6 500hp system from FiTech.

Some owners may prefer an electronic fuel injection system to run their engines with an independent mechanism for the trans. You may consider systems that easily communicate between the independent controllers via a controller area network (CAN) bus system. CAN is a unique method for digital systems to transfer data quickly, including rpm, TPS, temperatures, and MAP. An example is TCI’s TCU 2.0, which efficiently transfers data through a CAN bus system with a FAST EFI system.

Transmissions control modules that require a laptop

The following are the TCMs that can be accessed via a laptop:

  • PSC ATI
  • FiTech Go Shift
  • MicroSquirt
  • Chevrolet Performance
  • PCS TCM 2800

Transmission Control Module That Do Not Require a Laptop

These TCMS do not require the use of a laptop to access them:

  • MSD TCM
  • TCI EZ TCU
  • Edelbrock TC
  • Painless Perfect Torc
  • HGM CompuShift Sport
  • PCS SimpleShift

Conclusion

With everything considered, transmission controllers will certainly find popularity among speedsters who always want to utilize the full potential of the transmissions installed in their high-performance-oriented vehicles.

Performance Evolution of Ford Automatic Transmissions

Performance Evolution of Ford Automatic Transmissions - Gearstar

The era between 1964 and the 1980s was remarkable in the automobile industry. During this period, millions of Ford vehicles – i.e., cars and trucks – were equipped with C4 and C5 automatic transmissions. These were purely ford automatic transmissions – i.e., zero electronic controls – that were very popular with hot rodders, racers, as well as restorers due to their low cost and simplicity.

However, despite the possibility of purchasing cores and rebuilding in order to suit the requirements of a particular vehicle for a far less rebuilt modern overdrive automatic transmission with electronic controls, they lacked the lockup torque converters and overdriven gears newer transmissions rely heavily upon in order to boost fuel economy. Ford faced a seemingly insurmountable challenge in the late 1950s: shedding the old-fashioned technology and dated image. However, the carmaker faced the challenge head-on, beginning in 1958 with the new generation of the FE-series V-8 engines. 

Before 1960, Ford vehicles were burdened with heavily obsolete BorgWarner-designed cast-iron FX and MX automatic transmissions famously called Ford-O-Matics, Cruise-O-Matics, and Merc-O-Matics. The FX was small, while the MX was a popular large-case automatic. These were rugged, dependable, and heavy transmissions, so complex that adapting them to performance applications was next to impossible.

Falcon and Comet

Ford introduced its Falcon and Comet sixes in 1960. Just before then, Ford engineers had painstakingly developed lightweight aluminum-case automatic transmissions for the exciting lineup of vehicles that arrived in the ’60s. Soon enough, the 90-degree Fairlane small-block V8s followed the lightweight-iron Falcon and Comet sixes in 1962. The Mercury Comet and Ford Falcon, introduced in the ’60s, came with the new lightweight Ford-O-Matic two-speed transmission. BorgWarner manufactured this 2-speed transmission for new-generation small V-8s and straight-6.

The hard steel parts inside and out and its aluminum case made the Ford-O-Matic different from its predecessor. In its early application, the Ford-O-Matic transferred heat to the atmosphere through the cooling vents in the bell housing and torque converter. There was no transmission cooler in the radiator, and no fluid was used as a coolant. However, later versions of this Ford transmission came with a transmission fluid cooler in the radiator. In addition, the Merc-O-Matic/Ford-O-Matic came with a case-fill dipstick tube, with the main case and bell housing cast as one, in order to reduce the likelihood of leakage and excess weight.

The Ford C4 Transmission

After learning a lot from the BorgWarner 2-speed automatic transmission, Ford took its knowledge and used it to build the C4 3-speed automatic transmission known as the Cruise-O-Matic for the 1964 model year.

  • The C4 automatic transmission was manufactured at Ford’s transmission plant in Sharonville, Ohio, from 1964 to 1981. It was the first automatic transmission Ford solely designed and constructed. It utilized a new, cutting-edge Simpson compound planetary gear set that became the industry standard for decades.
  • The C4 automatic transmission earned its name from the model year it was manufactured, i.e., ‘C’ denotes the ’60s decade while ‘4’ was for the year 1964. However, this naming practice lasted less time than expected, as the transmissions that followed were C3 in the ’70s and C5 in the ’80s.
  • The C4 was known as the ‘Dual-Range Cruise-O-Matic’ from ’64 to ’66, otherwise known as the Green Dot transmission. This transmission was equipped with a unique valve body that enables you to start driving in second gear on snow and ice with a 2-3 upshift. This is the small dot on the indicator.

The larger green dot near ‘L’ at the detent allows a driver to start in first gear and go through the typical 1-2-3 upshift program.

Cruise-O-Matic

Ford called its new automatic transmission the Cruise-O-Matic, but Mercury called its own the Merc-O-Matic. Bear in mind that ‘Cruise-O-Matic’ was the broad marketing name for the Ford automatic transmissions created in the mid-’60s era. But by 1967, the name ‘Cruise-O-Matic’ was dropped in favor of the name ‘Select-Shift’ and was picked up and used for all automatic transmissions from Ford. The C4 automatic transmission only had the 5-bolt bell housing for V-8s for only the 1964 model year. However, by August 1964, the V-8s and C4 it was mated to were ingeniously fitted into the larger 6-bolt bell housing in order to reduce vibration, noise, and harshness.

The following are the C4 gear ratios:

  • First gear – 2.46:1
  • Second gear – 1.46:1
  • Third gear – 1.00:1
  • Reverse gear – 2.20:1

The C4 transmission evolved, resulting in the introduction of other design changes. The most notable was the ’67 and ’69 valve body that offers a traditional P-R-N-D-2-1 shift pattern.

The Ford C5 Transmission

Ford introduced the popular C5 Select-Shift transmission in 1982. Its only difference from its predecessor was that it came with a locking torque converter in order to boost fuel economy significantly. The C5 automatic transmission remained in production from 1982 to 1986 at Ford’s transmission and axle plant in Livonia, Michigan. But it wasn’t recommended as one of the high-performance transmissions. Nevertheless, the C5 transmission shares most of its internal components with its predecessor, including the cases. The C5 transmission was manufactured as pan-fill and case-fill with 157- or 167-tooth flexplates.

The Ford C6 Transmission 

Ford introduced its heavy-duty C6 –speed transmission for high-torque applications. This automatic transmission was behind the large-displacement big-block V-8s. Its internal components and case were entirely different from the C4 transmission, but internally, they were the same, though scaled largely for heavy-duty use.

The rugged C6 transmission had four basic bell housing bolt patterns throughout its long production life as it was designed solely for high-power applications. There’s also the small-block C6 automatic transmission intended only for 351W as well as 351C engines and fits any 6-bolt 289/302/351W/51C small-block bell housing bolt pattern.

The C6 transmission for diesel engines was produced in the ’80s before the introduction of the 4R100 (E4OD) in 1989. Despite the arrival of the 4R100, Ford continued producing the C6 automatic transmission for industrial applications until 1996.

The arrival of the ’70s met Ford with a respectable lineup of great and modern lightweight automatic transmissions. Here are the C6 gear ratios:

  • First Gear – 2.46:1
  • Second Gear – 1.46:1
  • Third Gear – 1.00:1
  • Reverse – 2.00:1

Conclusion

Ford has undergone decades of performance evolution from it’s first automatic transmission to the current one in the market. The current transmission may not be perfect in every sense. But it is sure the car maker will improve its transmissions to deliver worthy experiences for their esteemed customers.

Here’s How the Chevy 4L60E Transmission Shifted V8 Engines for Decades

Chevy 4L60E Transmission

The 4L60E refers to a series of General Motors transmissions manufactured and introduced for sports utility vehicles, cars, and trucks. It significantly improved its predecessor, the 4L60 transmissions, which included upgrading hydraulics to electronically controlled transmissions. Despite its flaws, the Chevy 4L60E Transmission delivers exceptional performance, which is why many Chevy owners love it. This article highlights the evolution of the 4L60E transmission, how it shifted V8 engines in Chevys, and more.

What You Should Know About The Chevy 4L60E Transmission 

The 4L60E transmission is a 4-speed gear system – i.e., it utilizes four forward gears and one reverse gear – ideal for street performance and retrofitting because they can be modified easily. Its major characteristics include:

  • 8.4 quarts (9.64-inch torque converter), 11.4 quartz (11.81-inch torque converter), or 14 quartz fluid capacity. The 4L60E transmission versions with a deep pan or sizeable cooling circuit required 14 quartz.
  • Longitudinal mount
  • Four forward gears
  • 60 relative torque rating of 360 lb-ft.
  • Compatible with V6 and V8 engines
  • Electronic valve body with varied ratios for optimal performance

The 4L60E transmission’s additional features and notable improvements over the years include the following:

  • Increased torque capacity in 2001
  • Modified downshift solenoid and 6-bolt tail shaft in 1996
  • A pulse width modulated torque converter was added in 1995.

The 4L60E transmission is the gear system to turn to when upgrading a modern vehicle or restoring a vintage automobile. It is the preferred trans for vehicles used for long road trips or on rough terrains. It weighs 146 lbs., but adding the recommended transmission fluid for the 4L60E takes it all up to 162 lbs.

Although a manual gearbox may be a race driver’s choice, the 4L60E transmission’s exceptional capabilities are the best option. The 4L60E doesn’t utilize hydraulic pressure but uses actuators and electronic solenoids for controlling the clutch, valves, and bands, giving more than enough room for gear shifting. This significantly boosts the transmission’s performance and fuel economy.

Gear Ratios

The 4L60E transmission offers a wide range of gear ratios, with the first gear ratio perfect for pulling off very quickly under acceleration. It is also the gear ratio of choice for pulling/carrying a heavy load or off-road driving.

The fourth gear, which is the overdrive gear, permits the achievement of lower revolutions per minute at cruising speeds and a potentially higher overall top speed.

Here are the gear ratios of the 4L60E transmission:

  • First gear – 3.06:1
  • Second gear – 1.62:1
  • Third gear – 1.00:1
  • Fourth gear – 0.70:1
  • Reverse – 2.29:1

Strengths of the 4L60E Transmission 

The 4L60E transmission is known for its remarkable strength and capability of transmitting lots of torque and power from truck applications and performance automobiles. It is used in vehicles weighing as much as 8,600 lbs. gross vehicle weight, making it the go-to transmission for the ever-dynamic transmission building aftermarket. General Motors manufactured the high-performance versions of the 4L60E, and it is used extensively in several vehicle models such as:

  • The Chevrolet Corvette
  • The Chevrolet Impala SS
  • The Australian-built Pontiac GTO
  • The Chevy Camaro
  • The Pontiac Firebird 

Chevy has the highest number of models – i.e., up to 16 Chevy models – that utilized the 4L60E transmission that shifted V8 engines for decades. But the company eventually stopped using this transmission in 2014 when it appeared for the last time on the Chevrolet Express.

As mentioned earlier, the 4L60E utilizes two-shift solenoids for actuating gear changes. These solenoids were known as Shift Solenoid A and Shift Solenoid B in the early versions of this transmission. At the time, the PCM could easily achieve four distinct gear ratios by turning them on and off in pre-set patterns.

However, the names were changed to 1-2 Shift Solenoid and 2-3 Shift Solenoid, respectively, in compliance with OBDII regulations.

Since the goal of General Motors was to eliminate the reliance on hydraulic pressure when making gear changes, the company improved fuel efficiency and performance using a computer that could swiftly interpret data derived from speed sensors. This made it possible to decide the ideal period to shift gears using solenoids.

The Pulse Width Modulation (PWM)

The Pulse Width Modulation torque converter clutch solenoid present on all late models of the 4L60E transmission allows a seamless application – and release – of the torque converter clutch. In addition, the adapted or modified valve body controlled by a solenoid and electronic actuators make the 4L60E transmission readily controllable with a unique modern electronic transmission controller called the COMPUSHIFT.

The 4L60E Transmission Control with the COMPUSHIFT

The 4L60E transmission has a 13-pin or 15-pin case plug. Currently, only a handful of transmissions still use the 13-pin case plug. Experts highly recommend upgrading to the 4L60E, which utilizes the 15-pin case plug. A 17-pin case plug also exists but is only employed with the 4L70E equipped with the internal mode switch.

Benefits and Drawbacks of the 4L60E Transmission

Before overriding your existing gear with a solid 4L60E transmission, knowing the benefits and drawbacks of the latter is essential.

Here are the benefits and drawbacks of the 4L60E transmission:

Benefits

  • Firm and complete control of every aspect of the shift
  • Shift firmness or adjustment is controlled easily
  • Controllers of the 4L60E transmission make everything easy as they help establish exact shift points.
  • Enhanced torque capacity
  • Solid fuel economy performance
  • Super easy calibration of the speedometer
  • Super-fast transmission
  • Changes can be made easily to the shift points and line pressure
  • Adjusting the shift points from the interior is possible, making it less stressful.

Drawbacks

The 4L60E transmission may be one of the most efficient gear systems on the market, but it has several drawbacks you should be aware of. Here they are, arranged in no particular order:

  • Users need to add a TPS input alongside a carburetor
  • Setting it up is pretty expensive due to the need for an external controller
  • Push-in clips leak frequently and may require constant replacement
  • Shifts are sometimes delayed and harsh, while a few even stop working altogether. It is common for some shifts to get worn out.

Conclusion

The chevy 4L60E transmission belongs to the series of electronically operated automatic transmissions – and the most versatile – built by General Motors. It is the electronic version of its predecessor, the 4L60 transmission. It remains the perfect choice for upgrading your vehicle or restoring a vintage one.

The ABCs of a 4 Speed Automatic Transmission

The ABCs of a 4-Speed Automatic Transmission - Gearstar Performance Transmissions

Automatic transmissions are mechanisms designed to shift the gears of vehicles with the increase or sudden decrease of speed. Since the mechanism is automatic, the driver’s input to change the gears manually – as it is done with manual transmission – is not required. An automatic transmission readily adjusts the rotational speed of the internal combustion engine. This occurs so that the gears can handle different speed ranges and torque outputs. This article covers a particular type of transmission, the 4-speed automatic transmission, and everything you need to know about it. But before then, let’s highlight why vehicles use transmissions.

Why Do Vehicles Need a Transmission?

The engine of a vehicle is designed to generate torque. Therefore, in order to move the vehicle from its parking spot and into motion, there must be a transfer of the engine’s rotational power to the wheels. This is what the drivetrain, i.e., the wheelwork consisting of an intricately connected set of rotating gears via which force is transmitted of which the transmission is part of, accomplishes. Transferring power from the crankshaft to the wheels is impossible without the drivetrain. The crankshaft only spins at 800 revolutions per minute. Connecting a driveshaft directly to the crankshaft will snap it into pieces within seconds. This is how vital the drivetrain system is. However, a vehicle engine can only spin at a specific number of speeds in order to perform optimally.

If the engine’s spin is too low, the vehicle won’t budge an inch from its parking spot. If the spin is too fast, the engine automatically self-destructs. What is required is a way to automatically multiply the power the engine produces when required – i.e., traveling up a hill, starting from a parked position, etc. – while decreasing the amount of power transmitted from the engine when it is not required, i.e., traveling very fast, going downhill, etc. This is where the transmission comes in.

Transmission’s Primary Goal

The primary goal is to ensure that the engine spins at an optimal rate, i.e., not too fast or too slow, while providing the wheels with an appropriate amount of power required to move or stop the vehicle simultaneously, irrespective of the situation you find yourself in. The transmission can be locked between the engine and the rest of the drivetrain. It acts like a power switchboard of sorts for your vehicle. The drivetrain is an entire assembly that covers the transmission, engine, differential, driveshaft, and axles. This system drives your vehicle forward or sets it in motion.

Two major types of transmissions exist:

  1. Manual transmission 
  2. Automatic transmission

Manual transmissions require the driver’s input, i.e., you control the gears to be engaged by pressing a clutch pedal and shifting the necessary gear into place. On the other hand, an automatic transmission is a brilliant piece of engineering that determines the particular gear to be engaged without human input. All you need to do is step on the brake or gas pedals as desired. This is nothing short of automotive magic.

Another but less common transmission type is the electronically controlled transmission, which you will find on a few newer vehicles. These transmissions use hydraulics to actuate the bands and clutches. But an electric solenoid controls each hydraulic circuit. Different versions of automatic transmissions exist, but today, the 4-speed automatic transmission will be discussed.

What is a 4 Speed Automatic Transmission?

A 4-speed automatic transmission is the gear system that allows your vehicle to run at specific revolutions per minute (RPM) – usually 1,000 RPM – at four different speeds. For instance, a 4-speed automatic transmission at 1,000 RPM will allow your vehicle to run at 10, 20, 45, and 60 kilometers per hour. A vehicle with 5-speed automatic transmission can be driven at 5 different speeds at 1,000 revolutions per minute.

Bear in mind that the acceleration of a vehicle with a 4-speed automatic transmission will be slower than a vehicle with a 5-speed automatic transmission. This is because it will need to cover more speed – in kilometers per hour or miles per hour – before shifting to the next gear. Most vehicles with 4-speed automatic transmissions were manufactured during the 1990s. But most new model automobiles today come with 5-speed or even 6-speed automatic transmissions. Some excellent examples of vehicles with a 4-speed automatic transmission include:

  • Mazda Demio
  • Dodge Avenger SE
  • Subaru Forester
  • Scion xB, etc.

The popular Toyota models with 4-speed automatic transmissions are Tacoma, Corolla, and Yaris.

Which is Better – a 4-Speed Automatic Transmission or a 5-Speed Automatic Transmission?

No one can accurately say one is much better than the other, though the vehicle’s model, brand, and year of production can play critical roles in this determination. Besides these factors, it doesn’t make much of a difference, except that the 5-speed automatic transmission has several benefits you should be aware of, such as:

  • It offers better fuel economy due to its narrower speed range
  • It will give you more shifting clutches and actuation overhead energy than its counterpart. But this can eventually impact fuel economy negatively in the long run.
  • Enhanced drivability
  • You will experience less speed change than a 4-speed automatic transmission. This makes the shift feel much better to handle while in motion.

Regarding fuel efficiency and performance, the two versions of the automatic transmission are similar. This is why many auto experts recommend opting for a 4-speed automatic transmission, especially if the automobile is available at a pocket-friendly price.

More gears will only do a little good, except helping your automobile run its engine at the maximum revolutions per minute range for extended periods. Undoubtedly, every vehicle powered by a 4-speed automatic transmission will be a bit behind one with a 5-speed automatic. However, vehicles with 5-speed automatic transmissions will call for maintenance sessions – to allow the driver to shift more – which will set you back a few bucks from time to time.

Conclusion

The transmission is a vital part of any vehicle and must never be taken for granted. Without it, your vehicle will not budge from the garage or wherever you park it. Different versions of automatic transmissions exist, and one of the early versions is the 4-speed automatic transmission. The 4-speed transmission was manufactured and used in vehicles produced in the ’90s. As a result, they’re the preferred choice over their more modern counterparts for those with tight budgets and fewer maintenance requirements.

6 Automotive Things to Be Grateful for This Thanksgiving and Beyond

6 Automotive Things to Be Grateful for This Thanksgiving and Beyond - Gearstar

It’s Thanksgiving month again, and time to be eternally grateful for everything life has thrown our way – the good, the bad, the ugly, and we survived them all. But most importantly, being thankful for the things experienced within the automotive universe and celebrate car culture. Therefore, here are the top six automotive things to be grateful for this Thanksgiving and beyond.

1. Automatic Transmissions

Once upon a time, manual transmissions were the “latest and greatest” with their perks. But this is no longer the case as automatic transmissions have taken over. For instance, only four percent of vehicles sold in 2013 came with manual transmissions. Moreover, up to 67 percent of new vehicle models don’t even have manual options.

Driving safely on roads already commands lots of attention or focus. Automatic transmissions eliminate acceleration, proper shifting, and deceleration from the mix. This significantly minimizes the direct involvement of the driver. Automatic transmissions take the additional stress out of the equation, which is why many road users love them.

How Automatic Transmissions Work

This is how vehicles with automatic transmissions operate. When you switch to the ‘Drive’ mode, the system activates. Pressing the accelerator towards the floorboard enables the engine’s crankshaft to rotate more rapidly. As the vehicle moves forward, the automatic transmission’s electronics and hydraulics sense its speed in connection to the engine speed.

As a result, the transmission changes gears automatically in response to the engine’s reaction. The rapid rotation of the engine’s crankshaft results in more pressure in the torque converter. The hydraulics within the classic automatic transmission senses these speed changes and activates other hydraulics to change gears within the planetary set. But today, electronics perfectly supplement the sensing process, and the transmission works together with the vehicle’s other systems.

Components of Automatic Transmissions

In simple words, automatic transmissions change gears without the direct involvement of the driver, aside from the designated options like:

  • Neutral
  • Drive
  • Reverse
  • Park

However, these commands will only be activated with the involvement of several key components that work hand-in-hand within a variety of conditions time and again. The most crucial elements of automatic transmissions are:

  • Planetary gears. Automatic transmissions generally make use of different types of gear sets. The set of planetary gears they use creates multiple gear ratios since the hydraulics of the automatic transmissions control them. The forward speed of your vehicle will be limited severely if your automobile comes with a single forward gear and a torque converter. This is the primary reason gear-changing is crucial.
  • Torque converters. Torque converters are perfect replacements for mechanical clutches in manual transmissions. They perform the same functions as clutches by enabling the engine connection and disconnection from the driveline as required to facilitate gear changing. The development of practical automatic transmissions would have been impossible without the torque converter. Cars with automatic transmissions are set in motion via fluid dynamics that transfer torque from the engine. This capability enables you to have your foot pressed firmly on the brake while your vehicle is still in ‘Drive’ mode when motionless at a stoplight. But fluid dynamics soaks up the torque when moving forward is not desired.
  • Clutches and brake bands. Clutches and brake bands prompt the changing of gears within the planetary gear set. Clutches in automatic transmissions help determine the specific gear ratio the planetary gearset creates. The brake bands tighten to hold a specific gear stationary or loosen up to enable that particular gear to spin. The combination of spinning and stationary gears within the gearset generates individual gear ratios.

2. Modern Safety Tech

Modern automotive crash safety technology and design have helped save countless lives. You may think you don’t need suitable old seat belts and airbags, but you should always be thankful they are there. This is crucial, especially since you share and use the road with other users with varying skill levels. Be thankful for innovative safety technologies, especially the lane-keeping assist and pre-collision braking systems that help prevent unskilled or distracted drivers from running into you.

3. Studded Snow Tires

That time of the year is upon this part of the world where temperature plummets and the lakes freeze out. Ice-racing drivers are chomping at the bits as snow season draws closer, and they need to switch their tires to studded snow options. Snow-studded tires enable you to pitch your vehicle around frozen race courses at double-digit or triple-digit speeds. However, remember that these tires are primarily designed for use on the road. Remember to check out the legality since only a few places allow studded snow tires.

4. V8 Engines

The V-type, 8-cylinder configuration engines are well-known for their power-generating potential, sound quality, and smoothness. In addition, the V8 offers loads of cylinder displacement within a reasonably small package, i.e., it gives you massive power in a tiny automobile. The V8 engine layout is almost 100 percent guaranteed to please its user, even though it appears time is running out for this particular configuration.

5. Automatic Headlights

Automatic headlights are a welcome development. They automatically kick on low beams when the sun gets low in the sky or when driving in a tunnel. They help save you the stress of switching on headlights in situations where you may not ordinarily think even to put them on.

6. Apple CarPlay

Apple CarPlay is another essential automotive feature you should be thankful for as Thanksgiving Day approaches. All you need to do is plug in your iPhone via a USB cable, and a familiar, user-friendly interface optimized for extensive use while driving pops up. In addition, the Apple CarPlay is easy to pick out between different menus or overly distracting. Apple CarPlay’s multimedia UI is easily understood, even by people who are not tech-savvy. Moreover, the experience is the same, irrespective of whether it is installed in a Honda Civic sedan or F-150 pickup truck.

Final Takeaway

These are just a handful of the automotive things you should be grateful for this Thanksgiving and beyond. As automotive technology advances, there will be much more to be thankful for.

6 Long-Term Benefits of a Rebuilt Transmission

6 Long-Term Benefits of a Transmission Rebuild - Gearstar

Is your vehicle transmission giving you a headache, and you’re already contemplating replacing it with a brand-new one? Replacing a faulty vehicle transmission can be an enormous task. Getting a brand-new vehicle transmission will cost you much of your hard-earned money. However, there is a less costly way to get your defective vehicle transmission fixed, and that is to rebuild it. Rebuilding your transmission will require total disassembling and checking each component for wear. If you’re unsure about this option, read on to learn more about transmission rebuild and why it is the best option for anyone on a tight budget. You will also discover the top six long-term benefits of a rebuilt transmission.

What Is a Rebuilt Transmission?

A rebuilt transmission refers to a major mechanical overhaul performed on a vehicle’s transmission. A transmission is akin to an automobile engine and is composed of several interrelated mechanical components that tend to wear and tear over time, especially with extended use. By rebuilding a vehicle’s transmission, all the worn parts are replaced. However, this prevents the entire replacement of the automobile transmission, which is usually costlier than rebuilding it.

Why Should You Rebuild Your Vehicle’s Transmission?

Rebuilding a transmission is the best – or most popular – option for anyone who wants to avoid forking out a lot of money to replace a worn-out or severely damaged transmission with a brand-new one. In reality, brand-new transmissions are more modern, especially those available with the latest model of vehicles these days. However, they have proven to be as expensive as brand-new car engines.

Therefore, people with tight budgets or those who want to avoid paying the exorbitant amount required to secure a brand-new vehicle transmission will prefer a transmission rebuild. Rebuilding a transmission generally entails removal and careful inspection of the vehicle transmission. This also includes replacing or refurbishing any severely damaged or worn transmission components.

6 Long-Term Benefits of a Rebuilt Transmission

When transmission problems rear their ugly heads, the first thought that passes through the vehicle owner’s mind is getting a brand-new vehicle. This can be a distressing thought, especially if you’re on a very tight budget and can’t afford a new vehicle transmission. But this shouldn’t be the case. Instead, you can have your vehicle transmission rebuilt by a professional mechanic. There are tremendous long-term benefits that come with a rebuilt transmission that only a few people know. Here are some of the top six benefits of a rebuilt transmission:

1. Better Performance

A rebuilt transmission worked over by a professional mechanic provides top-notch performance over another with severe internal damage and has only undergone a quick fix. You get to spend far less money for the quick fix and get it running within a short period. But the transmission will never rerun the right way. However, rebuilding your vehicle transmission is an excellent avenue to getting it back to top-notch condition. This means a smooth and dependable performance.

2. Quicker Than Buying a Used Transmission

If you own an older vehicle model, getting a brand-new transmission is next to impossible. Finding a used transmission for your older vehicle model can also be a hassle. This is because you will have to visit junkyards or look for one at online auctions. Even if luck smiles on you and you find one, it will take several weeks to be delivered.

It will also take a few more days to review the used transmission to ensure it is in excellent working condition. But rebuilding your transmission will take less time. The entire process of rebuilding your transmission usually takes anything from two to four days, maximum. Transmission rebuilds guarantee that the work done is 100 percent up to par. Your older car model will be up and running in a few days.

3. Moderate Cost Savings

Transmission rebuilds generally cost much more upfront than other transmission repairs or fixes. But this option will save you a lot of money down the road as you will no longer have to deal with ongoing problems and repeat issues that will cost you more over time with constant repairs when required. There is a better way to go if you plan to keep your older model vehicle for several years. But even if you change your mind and prepare to sell the car later, the rebuilt transmission’s warranty adds massive value to the buyer’s mind.

4. Extended Vehicle Lifespan

A faulty or damaged vehicle transmission puts much strain on other drivetrain and powertrain components. A weak transmission affects everything, such as:

  • Transfer case
  • Cooling system
  • Wheels and suspension
  • Exhaust
  • Axles
  • Differentials
  • Engine

This is why rebuilding your transmission is the best option, as it runs like new again. This helps protect other vital vehicle components and generally extends the lifespan of your SUV, car, or truck.

5. Profound Peace of Mind

The main purpose for rebuilding your vehicle transmission is to ensure it runs like a brand-new unit again. The transmission is rebuilt from scratch and often backed by several years of warranty. Every damaged or worn component is replaced while the still-good working parts undergo a thorough cleaning and then reinstalled appropriately. This includes every nut and bold. There’s nothing like the profound peace of mind you will enjoy, knowing you will no longer battle constant transmission repairs.

6. Retaining the Original Transmission

Another benefit of rebuilding your transmission is keeping your original transmission, i.e., the one primarily designed for and installed in your car or SUV. This transmission is already tuned to work seamlessly with your car engine and the overall drivetrain system. Getting a brand-new OEM transmission is far more expensive than a transmission rebuild.

The Bottom Line

These are just some of the remarkable long-term benefits of a rebuilt transmission instead of getting a brand-new one. Therefore, the next time you experience vehicle transmission problems, your first thought should be something other than purchasing a new car or transmission. Instead, it should be getting your vehicle to a professional mechanic for a complete transmission rebuild.

4R70W Performance Fundamentals Guide

4R70W Performance Fundamentals Guide - Gearstar

The 4R70W is a revised version of the famous Ford’s long-running 4-speed AOD (automatic overdrive) transmission that appeared in the ’80s. Experts believe a robust performance transmission adds more power to vehicles like the 4th generation Ford Mustang. In addition, it was a much-needed answer to the fuel efficiency issues that plagued the United States during the 1973 oil embargo crisis. General Motors and Chrysler saw the remarkable success of Ford’s 4R70W performance and followed almost immediately with the unique and respective versions. The nomenclature of the 4R70W breaks down this way:

  • 4: Four forward speeds
  • R: Rear-wheel drive
  • 70: Torque rating x 10 (holds up to 700 lb-ft)
  • W: Wide-ratio

You need to know the fundamentals of the 4R70W performance transmission.

Overview of the 4R70W Performance Transmission

As mentioned earlier, the 4R70W transmission is a significantly enhanced AOD with a wide gear ratio and rear-wheel overdrive. In addition, the 4R70W transmission’s first and second-gear ratios are higher. This has given rise to several benefits in vehicles mounted with this high-performance transmission. Drivers of the 4R70W performance transmission will enjoy better mechanical advantage, lower fuel consumption, and even better take-off acceleration. The strength of the gearset is also enhanced. The 4R70W features a ‘wide ratio’ gear set. In 1998, the intermediate one-way clutch was replaced with a mechanical diode.

4R70W Specs and Ratios

The 4R70W transmission’s case material is aluminum and features a Motorcraft FT 105 transmission filter. It has a maximum torque input of approximately 516 lb-ft. The 4R70W transmission’s gear ratios are as follows:

  • First gear: 2.84:1
  • Second gear: 1.55:1
  • Third gear: 1.00:1
  • Fourth gear (overdrive): 0.70:1
  • Reverse: 2.32:1

The automatic overdrive electronic control transmission (AODE) was launched in 1991. This particular transmission is different from the AOD in several ways. This includes:

  • Computer controls
  • Torque controller
  • Front pump assembly
  • Single input shaft
  • New valve body

The following are the respective gear ratios of the AODE:

  • First gear: 2.40:1
  • Second gear: 1.47:1
  • Third gear: 1:2
  • Fourth gear: 0.67:1

As you can see, their gear ratios are significantly different when compared side by side. Furthermore, note that valve bodies and cases of the 4R70W, AOD, and AODE are also different. This is why it is practically impossible to switch the valve bodies of these units, stipulating specificity. However, it is possible to take the gear train of the AOD and shove it into an AODE and experienced zero issues.

4R70W Facts

The ’70s birthed a slew of fuel-efficient vehicles, but the manufacturers had to sacrifice some performance and speed features exhibited by the older models. At the time, driving fuel-efficient cars was economically and environmentally friendly, making it possible to cover many more miles but with less fuel. Therefore, when oil prices rose by 400 percent, it became crucial to manufacturing fuel-efficient automobiles. Ford rose to the occasion in 1980 by creating the 4-speed AOD. This transmission had several features found in old designs, despite its newness. Nevertheless, it was the perfect replacement for many older transmissions created by Ford, including the FMX, C4, and C5. The AOD was similar to the 3-speed FMX automatics. These transmissions had a few components in common, including the Ravigneaux gear train, etc.

4R70W Pros and Cons

While the 4R70W may be a performance transmission, but it is not without issues. For instance, here are some pros and cons of the 4R70W transmission.

Pros

The 4R70W transmission comes with a significantly boosted overdrive band, including the following:

  • Improved pinpoint precision control;
  • Solid input shaft;
  • Enhanced front pump.

Another significant benefit of the 4R70W transmission is its remarkable compatibility with most Ford automobiles with minimal work or modification. Moreover, this transmission easily fits several older vehicles, furnishing them with magnificent performance and efficiency.

Cons

When you overload the 4R70W transmission, you’re courting problems, as torque and power have a pronounced limit. Exceeding these limits can cause many various transmission problems. Other issues plaguing the 4R70W transmission include:

  • Delay in lock-up;
  • Intermediate clutch failures;
  • Rough 2-3 shifts;
  • Significant loss of forward gears and 4th gear;
  • Considerable shudder in reverse or delay in reverse;
  • Pump noise and leakage of the front seal;
  • Significant loss of 2nd and 3rd gears.

Every automatic transmission worth its salt requires consistent maintenance. The 4R70 transmission is included. Maintaining this robust transmission regularly guarantees its longevity. This is why it is highly recommended that a certified expert looks into this robust automatic transmission during installation. If all these issues are eliminated, it will go a long way in boosting the overall reliability of your 4R70W performance transmission while providing the much-needed power boost.

Identifying the 4R70W Transmission

Many need to learn how to quickly identify the 4R70W or know whether or not they have one. However, you can identify the 4R70W transmission by looking at the following:

  • Electric plug and cable. Both 4R70W and AOD transmissions come with a plug on their rear housing on the driver’s side. The electronic control cable plugs right into this particular spot in the unit. This differentiates the 4R70W and AODE transmissions from the older AOD units.
  • Lightweight components. Compared to their predecessors, 4R70W and AODE transmissions come with an aluminum front pump against the cast iron that the AOD has. The AODE and 4R70W transmissions are also lighter due to their stamped steel clutch packs – which are lighter than the cast steel of the AOD.

These are just a few identifiable aspects that differentiate the 4R70W transmission from its older counterparts.

4R70W Performance Key Takeaways

The 4R70W performance transmission is one of the most outstanding stock transmissions on the market, guaranteed to perform even better in vehicles like the 4th generation Ford Mustang. The 4R70W is best for performance driving or drag racing enthusiasts, and good speed is 100 percent guaranteed.