Modern cars have become more complicated from what they were before due to the launch of new technologies. These technologies have led to features such as dual-clutch, CVT's, semi-automatic, and automatic transmissions, transmissions built with as high as ten gears, among many others. Unlike manual transmissions that can disconnect the engine from the transmission using a clutch, the same cannot be said for automatic transmissions. The reason is, automatics are devoid of clutches and instead, rely on the torque converter to keep the engine turning while the gears and wheels in the transmission come to a halt. Thus, the torque converter in cars with automatic transmissions is very important in any vehicle today and if your transmission is blown or you're experiencing symptoms of a blown transmission, then the culprit could be its converter as we'll soon take a look at.
The advent of several transmissions since the launch of automobiles means there are a whole lot of them in 2019 and many more can be expected in years to come. However, some like the Mopar 727, which is known for its strength and easy adaptability in just about any car makes it essential to understand how to identify Mopar 727 performance transmissions. It is needful given the many characteristics and advantages that can still be derived from using a transmission that is three decades old. The Mopar 727 is also an excellent transmission to install into your Chrysler, AMC, or GM car or truck; thus, it can serve Chrysler and non-Chrysler applications. That being the case, we've outlined the unique physical and operational features of the Mopar 727, which will enable you to differentiate it from a wide range of transmissions that are also contending for attention.
What Is the Mopar 727 Performance Transmission?The Chrysler A-727 transmission, also known as the TorqueFlite 8 units is a three-speed transmission that was launched around 1956. It was mainly used in Mopar cars with larger engine size from 1962 and also found a use case in certain vehicles as their original equipment component. The A-727 transmission is robust and highly adaptable in several applications which can be attributed to its widespread use in about 30 years. Its strength meant it could be used in Chrysler cars and non-Mopar applications such as work trucks as well as high-performance vehicles like sports cars. Within these vehicles, the Mopar 727 could handle engines whose horsepower went as high as 450hp which was an attestation of its strength. It can also work well in higher torque or higher rpm, and most notably, cars in which a bulletproof automatic transmission is required. To that effect, if you decide to use this transmission today, then it will begin with knowing how to identify a Mopar 727 performance transmission.
Easy Ways to Identify 727 Performance TransmissionsUpon the launch of the earliest version of the A-727 in 1956, it featured a cast-iron case. However, from 1962, there was a switch to the use of aluminum cases. Thus, you'll find one of the latest A-727 transmission using an aluminum case just like the Mopar vehicles between 1962 to the late 1980s. The A-727 is also unique from its oddly shaped oil pan with 14 bolts. Other features that will enable you to identify the Moper 727 performance transmission are:
1. Transmission Bands and Shift RatiosThere are two transmission bands on the A-727 where one band serves for reverse and the other for kick down. This transmission's shift ratios were:
- First gear: 2.54:1
- Second gear: 1.45:1
- Third gear: 1.0:1
- Reverse gear: 2.21:1
2. AdoptionA lookout for when the release year of the Mopar vehicle can help you ascertain if it is using an A-727 transmission or not. For instance, Mopar vehicles between 1962 and the late 1980s began to use the aluminum-cased A-727. The aluminum-cased A-727 was adopted in performance vehicles from other manufacturers from the mid-1960s. Similarly, the Jensen Interceptor and its Chrysler 383 engine took advantage of the Torque Command "8" which was released in 1956 as its automatic transmission.
3. Bell HousingDepending on the engine you want to install the A-727 transmission in, it is needful to get one whose dimension or bell housing is right for your vehicle. An 18-inch bell-housing bolt pattern was used by small-block V-8s while an 18.875-inch bolt pattern was used by Chevrolet big-block applications. The AMC V-8 engines were drilled to the right small-block bell housing bolt pattern, and their rear output shaft can be a perfect fit to existing Jeep transfer case assemblies.
4. Transmission UpgradesThere were several upgrades to the A-727s which makes it needful to select the correct year of the donor car whose transmission you'll be installing in your vehicle. That being the case, A-727s were push button shift whose push buttons were located on the dash from 1962 to 1964. Few units from 1965 were still cable activated, but a majority of transmissions from 1965 and newer ones have a rod-style shift linkage. Between 1962 to 1965, transmissions featured a rear flange instead of a yoke linked to the driveshaft with a universal joint. Transmissions from years above this range featured a standard splined shaft using a basic slip yoke and cross-type U-joints.
5. FlexplateMinor changes were still made to the A-727 after 1966, and one of such was the modification in flexplates in 1968 as well as the inclusion of a lockup converter in 1978. It is, therefore, important to select the right flexplate since those from 1968 and after came with flexplates with a larger center hole compared to those before 1968. In the same vein, a torque converter from 1966 and years after that, will not interchange into torque converters from years before 1966.
6. YearAn A-727 can also be identified as being a 1978 and newer lockup units just by examining the transmission's input shaft. It was built with a lockup if the shaft is smooth at its last half inch, on the contrary, if it is splined to the end of the input shaft, then it is a non-lockup transmission. Pre-lockup converters before 1978 are also weighted as A, B, and C weights, and there's no need to interchange either of these when trying to select the correct torque converter.
ConclusionAfter taking a look at the easy ways to identify a Mopar 727 performance transmission, choosing the right one to install in your vehicle becomes a breeze. The A-727 is worth it when consideration is given to the fact that it's been over 30 years since its first release; however, it can still offer strength and support high-performance power. Whether its a replacement you're looking for your Chrysler, AMC, or GM car, the A-727 is easy to find. All it'll take is to tell it apart from a wide range of transmissions in the market using the specifications we have outlined above. What's more, selecting an A-727 that is right for the application it will be used in, takes it the extra step to ensure the level of performance you get is an impressive one. Thus, it is entirely up to you to make a choice from several depending on the year they were made whether they are older or newer versions of the Mopar A-727.
Ford's C4 and C6 3 speed automatic transmissions are similar in operational characteristics; however, there are still unique differences between the C4 and C6 transmissions. Starting from the year they were produced, their specifications, as well as their applications, these two transmissions are worth comparing side by side. For instance, while C4 transmissions may have been launched and further designed in different versions between 1964 and 1981, C6 transmissions found application in certain vehicles around 1966 to 1996. The list goes on and on, but there are also similarities between these two and the most obvious is that they are automatic transmissions that change gears automatically unlike manuals. Nonetheless, let's take a closer look at the differences between Ford C4 and C6 transmissions.
Differences Between Ford C4 and C6 TransmissionsThe Ford C4 and C6 transmission specs show that there are apparent differences between either of these. The peculiar disparity between both include:
- Year of production
- Internal components
- Evolved versions
- Fluid type
1. Year of ProductionThe Ford C4 is also called the Dual-Range Cruise-O-Matic, FMX transmission and it was produced around 1964 and was used until 1981. Specifically, the vehicles that came with a C4 transmission were the Ford Bronco between 1973 to 1977, and the Ford F-series between 1965 to 1981. Here's what it looks like:
- Ford Bronco (1973–1977)
- Ford Cortina (1974–1982 )
- Ford F-Series (1965–1983)
- Ford Fairlane (1964–1970)
- Ford Fairmont (1978–1983)
- Ford Falcon (1965–1970)
- Ford Granada (1975–1982)
- Ford LTD (1975–1980)
- Diesel bell housing.
- FE bell housing for the Ford FE family engines.
- The Cleveland bell housing in the 351M, 400, and Ford 385 engine family.
- Windsor bell housing for all Windsor engines, 300 "Big Six" I-6, and the 351 Cleveland.
- Mel 462 used in 1966 to 1968 462 V-8 Lincoln Continental as well as 1968 to 1970 460 V-8 Lincoln Continental.
2. WeightFord C4 is a medium-duty transmission judging from its lightweight of 130 lbs dry w/ torque converter and its design with an aluminum case. So, if you're wondering how heavy is a C4 transmission, then it does not pack so much load at all. On the other hand, C6 transmission is a heavy-duty transmission that can handle much load. Like its predecessor, it featured a lightweight at 175 lbs dry w/ converter and an aluminum case. It is believed that by today's standards, a transmission of this nature has a high-level parasitic loss as a result of its weight and size.
3. Internal ComponentsThe C4 can be split into three sections, which are the transmission case, bell housing, and the tail housing. On the other hand, the C6 identification is the Borg-Warner flexible shift band and the Simpson planetary gearset it features. Within its case are a one-piece casting and a bell housing. Upon the C6's launch, it featured 17.4 inches, 7 inches, and 14 inches tailshaft housing lengths for the Lincoln cars, Ford trucks, and Ford passenger cars, respectively.
4. EvolvingA look back at the C4 and C6 transmissions when they were launched shows that there have been other variants since then. An instance is the case of the C4, which featured a 0.788 inch, 24 spline input shaft between 1964 to 1969. However, upgrades to the C4 in 1979 brought about a 26 spline, 0.839-inch shaft. The same was evident in 1971 when the input shaft was updated to feature 24 splines at the clutch hub and 26 splines on the torque converter side.
5. Fluid TypeTransmission fluid is essential in a car to allow the components to move swiftly while at the same time, ensure there is no overheating or slippage. Accordingly, the kind of transmission fluid the C4 uses is the Type F automatic transmission fluid. In contrast, the transmission fluid supported by the C6 is the Type FA automatic transmission fluid.
6. Modern UseThe contemporary use of the C4 and C6 transmissions are for different purposes. While both are used by hot rod and drag racers enthusiasts, the C6 has gained favoritism when it comes to offroad driving. The C4 is not quite suitable for off-road since it cannot handle as much power as the C6 and as such, it was mostly used in cars and not trucks.
7. Gear RatiosThe C4 gear ratios are:
- First Gear 46:1
- Second Gear 46:1
- Third Gear 00:1
- Reverse Gear 20:1
- First 46:1
- Second 46:1
- Third 00:1
- Reverse 00:1
Similarities Between the Ford C4 and C6 TransmissionWhile there is a significant disparity between the C4 and C6 transmission, it's worth noting that there are slight similarities between both. Some of these include:
- Transmission speed
- Aftermarket support
1. Transmission SpeedThe C4 and C6 are both 3-speed automatic transmissions designed by Ford.
2. SimplicityBoth transmissions' design spoke simplicity and durability. The C6, for instance, was admirable for its simplicity, strength, and reliability. It is even more durable than the C4, which makes it more expensive. As of today, it is still a popular choice for motorsports such as off-road and drag racing vehicles.
3. UpgradesThe C4 and C6 transmissions later had better versions of themselves and what was also noticeable between the duo is that they then featured an overdrive gear. Thus, if you're wondering if a C4 transmission has an overdrive, it most certainly does today. The overdriven gears were not present when they have launched as well as a lockup torque converters which are now evident in new transmission for boosting fuel economy. Similarly, the response to questions like how many gears does a C6 transmission has, would be three. What this boils down to, is earlier versions of these transmissions are entirely different from their later iterations.
4. GearsetThe C4 and C6 transmission upon their launch both depended on a Simpson planetary gearset.
5. Aftermarket SupportGiven that it has been decades since the launch of the C4 and C6, a car enthusiast can get excellent aftermarket support for both transmissions.What's also worthy to note, is that they have been revised to handle torque better than their older versions.
How to Tell a C4 From a C6 TransmissionA closer inspection of the C4 and C6 shows a similarity in physical appearance. However, they can be told apart by considering the following:
- Determine the number of bolts securing the transmission's oil pan to the transmission itself. On the C4, there will be 11 bolts while on a C6, there will be 17.
- Ascertain where the drain plug is situated at the transmission pan. If the plug is at the side of the transmission's pan, it is the C6 but on the bottom means it's a C4.
- Determine where the speedometer driver gear is located. If it is on the driver's side of the extension housing, it is the C6 but a C4, if it is at the rear of the transmission at the point, then driveshaft is connected to the transmission's back.
ConclusionJudging from the internal and external components, there are apparent differences between the C4 and C6 transmissions. These differences will enable you to tell a C4 from a C6 transmission despite their similar appearance. There have also been upgrades to either of these two in order to improve their level of performance from what they could offer as at when launched. Nonetheless, in the present year and beyond, they'll still be noteworthy as some of the most popular transmission ever designed by Ford Motors. Their performance also has led to the creation of modern automatic transmissions which car fanatics have come greatly to rely upon.
Do you own a car and are you aware that your transmission can encounter problems? If that's a no, then be informed that there are sure signs that your transmission fluid is low and knowing these symptoms can help you to avoid issues in the long run. You may be wondering, what happens if the transmission fluid is low? The hard truth is that for each time you delay to top up the fluid, it is one step closer to totally damaging your car's transmission, its engine, and other essential components. The effect may be evident whether you're aware of the early symptoms of low transmission fluid or not. For this reason, we've outlined the low transmission fluid symptoms, which will enable you to know when you need transmission fluid.
Why Is Transmission Fluid Important?It may just be fluid and not some expensive component of your car, but why is transmission fluid so important? Now, if that question has crossed your mind time and again, here's what you should know.
1. Facilitates the Transfer of PowerThe transmission's ability to transfer power from the engine to the pavement can be attributed to its fluid. In the same vein, the torque converter relies on automatic transmission fluid (ATF) to form a hydraulic circuit which enables it to transmit the rotational force between the engine and the transmission.
2. Cooling the TransmissionAs the transmission operates for a long time, it tends to create heat. However, the fluid helps to absorb this heat and expels the heat through the radiator. This fluid helps to reduce slippage or the tendency for it to occur.
3. Enable Smooth OperationGenerally, the transmission fluid enables the car's internal components to run smoothly. That is evident in that fact that when it runs low, these components can wear and tear and even to a level where they are beyond repair.
Signs of Low Transmission FluidOutlined below, are the symptoms of low transmission, which will ensure that you do not keep driving when the fluid is low. Several users have asked if there is a low transmission fluid light that would've quickly notified them that it's time for a refill. While there's no outright yes or no to that, nonetheless, being on the lookout for these significant symptoms can save you a lot of time, energy, and money, of having to repair car parts. They include:
- Warning light.
- Transmission overheating.
- Difficulty in shifting gears.
- Transmission fluid leakage.
- Generation of unusual sounds.
- Transmission slipping problems.
1. Transmission OverheatingIf your transmission begins to overheat, it's a clear sign that trouble is brewing. It won't come as a surprise if the car's transmission ends up failing as a result of this ineffective transmission of fluid. This is because the fluid aids in the lubrication of components to reduce friction. On the other hand, it is recommended that your fluid temperature should not go higher than 200 degrees since it also impacts negatively on the vehicle's performance. Also, consider the following temperature which could damage the transmission:
- 220 degrees: Varnish begins to form on metal parts.
- 240 degrees: Seals start to harden.
- 260 degrees: Clutches and the transmission bands start to slip.
- 295 degrees: Urgent need to call a tow truck.