700R4

The 700R4 is a four-speed automatic transmission that features a 30 percent overdrive in the fourth gear. The transmission was launched by GM, and is sometimes referred to as Hydramatic.

GM 700R4 transmissions were developed in 1982 as a replacement to the TH350. The main reason for the new design was to create an automatic transmission that was better on fuel economy. At the time, the 700R4 was used on trucks and rear-wheel drive vehicles such as the Chevrolet Blazer, Suburban, Corvette, Camaro, and Impala.

GM 700R4 Transmissions Are the Best Ever Produced

When the 700R4 was first released, it did have minor problems. Just five years later, the transmission had undergone several improvements and gained a more favorable reputation. In 1990, there was a name change to the 700R4 – the 4L60. It was essentially the same transmission, and in 1993, the 4L60 became electronically controlled instead of hydraulically controlled, which is where the name 4L60“E” comes from.

Even though the 700R4 transmission isn’t made new in GM's factories these days, they are still considered to be some of the best ever produced. The improved fuel economy and gear ratio in first gear were the hottest selling points, providing drivers with good acceleration when stopped at a stop sign or stoplight. Also, the gear ratio was good for off-roading.

Benefits of the 700R4

Let’s look at a few facts about the 700R4, and why this may be the transmission you need for your hot rod.

• Constructed of cast aluminum.

• One of best overdrive transmissions.

• Improved fuel economy.

• Lower first gear ratio.

• 30 percent overdrive.

• 23.4 inches long; 155 pounds in weight.

• Holds 11 quarts of transmission fluid.

Additional Vehicle Applications

The 700R4 was offered by GM as an option in a wide range of vehicles, making it a desirable and widely available transmission choice for many consumers.

Overheating & Maintenance Considerations

Addressing common concerns, such as overheating, is crucial. Ensuring your transmission is equipped with the right fluid and cooling setup can extend its lifespan significantly.

Whether upgrading for heavy-duty use, restoring a classic, or simply seeking a more reliable drive, custom transmissions like the GM 700R4 can enhance performance and durability when chosen carefully.

Introduction to Custom Transmissions

The world of custom transmissions has transformed how car and truck owners approach vehicle performance, especially for rear wheel drive vehicles. A high-quality automatic transmission is essential for smooth power delivery, optimal gear ratio selection, and long-term reliability.

Among the many options available, the GM 700R4 stands out for its advanced design, featuring a precise throttle valve (TV) cable and a robust gear set that delivers efficiency and durability. Unlike the older two-speed Powerglide transmission, the GM 700R4 offers a wider range of gear ratios, improving both acceleration and fuel economy.

When considering a custom transmission upgrade, factors to evaluate include:

• Overall length

• Transmission type

• Compatibility with your specific vehicle

The GM 700R4, known for its compact size and heavy-duty construction, is a popular fit for many applications, from classic cars to modern trucks. However, other transmissions, such as those used in vans or performance models like Corvettes, Camaros, and Impalas, may offer unique features tailored to specific needs.

Selecting the right custom transmission also involves choosing components such as the converter, gear ratios, and input shaft to ensure a seamless fit and reliable operation. Many reputable sellers offer a range of options, including warranty coverage and shipping services. Comparing prices, weights, and customer feedback can help determine the best fit for your build.

Frequently Asked Questions About The 700R4 Transmission

Is a 700R4 a good transmission?

Yes, the 700R4 is a good transmission and is widely regarded as one of GM’s most reliable early overdrive automatics. Its strong low first-gear ratio, improved fuel efficiency, and durable construction make it a popular choice for hot rods, restorations, daily drivers, and towing applications.

What year did GM stop using the 700R4 transmission?

GM began phasing out the 700R4 (Turbo-Hydramatic 700R4) name starting around 1990, when it was renamed the 4L60 as part of a new corporate naming convention.

In 1993 (for trucks/vans) and 1994 (for passenger cars), the transmission was significantly updated to use electronic controls, leading to the designation 4L60E (Electronic).

What's the difference between a 4L60E and a 700R4?

The main difference between a 4L60E and a 700R4 is how they are controlled.

• The 700R4 is hydraulically controlled using a TV cable.

• The 4L60E is electronically controlled and requires a computer or a standalone controller.

Internally, both share similar architecture, but the 4L60E includes updates in shift feel, tuning flexibility, and compatibility with later-model GM vehicles.

Can you run a 700R4 transmission without a computer?

Yes, you can run a 700R4 transmission without a computer. The 700R4 does not require electronic control and instead relies on a mechanical throttle valve (TV) cable for proper shifting. This makes it a great choice for carbureted engines, classic cars, off-road builds, and custom projects that don’t use modern electronic powertrains.

What causes a 700R4 to fail?

Overheating is the primary cause of transmission failure in the 700R4. This often occurs because the transmission is subjected to demanding use in vehicles like heavy-duty pickup trucks (towing) and performance cars (Corvette, Camaro). If you plan on taking your car out with the 700R4, we may recommend a cooler that can be installed with the transmission. Even if you purchase a car with an old 700R4, the trans can be rebuilt with the latest upgrades to make it stronger and more durable.

Custom Building a 700R4 With Innovative Technology

When performance matters, choosing the right transmission is critical. At Gearstar, each 700R4 is custom-built to order by hand, only using premium products and one technician from start to finish. Every 700R4 transmission is assembled from the ground up by a single master technician, from start to finish, ensuring total accountability and unmatched quality control.

Each Gearstar transmission undergoes extensive Dyno testing to simulate real-world stress before it leaves our facility. We don’t guess. We verify. Backed by an industry-leading warranty, Gearstar stands behind every 700R4 transmission with confidence and commitment.

Customer satisfaction drives everything we do. Whether you are building a street rod, restoring a classic, or creating a heavy-duty off-road rig, a Gearstar 700R4 transmission will exceed your expectations. Buy your 700R4 online today or contact our team for a custom estimate.