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The 4L80E transmission was designed with four forward gears and longitudinal engine configurations in mind. This type of transmission is electronically controlled, so it requires an Electronic Control Unit. It was originally designed for cars with GVWRs up to 22,000 lbs and was adopted by several high-end car manufacturers, including Rolls Royce and Bentley. Its advanced computer controls made it a great choice for luxury vehicles.
This transmission was initially designed to work between the 4L60E and the Allison series of transmissions. While the Allison series was mainly used for medium-duty trucks, it also worked with Big Block engines before the advent of Gen. III Vortec engines. The most notable difference between the 4L80E and the 4L60E is the torque converter clutch. This component may malfunction, causing the vehicle to lose power and the torque converter clutch to stay locked.
The 4L80E automatic transmission is meant to function between the 4L60E and the Allison series of transmissions. It was developed to fit with Big Block engines in the 1990s and with 6.2L and 6.5L diesels before the arrival of Gen. III Vortec engines. The 4L80E transmission's torque converter also uses two speed sensors to monitor input and output speeds. The torque converter's output speed sensor is able to calculate the best gear for a given speed and makes the appropriate changes in torque and shift maps.
The 4L80E's torque converter clutch uses data from a speed sensor to adjust shift speeds. The rear speed sensor is located on 1991 and 1996 models, while it may not be found on later models of the 4L80E. If the rear speed sensor is malfunctioning, the engine won't be able to send power to the wheels. Nevertheless, the torque converter clutch can be repaired or replaced. These two systems are the most common types of automatic transmissions in modern vehicles.
Among the most notable benefits of the 4L80E is its versatility. Its mechanical compatibility makes it a viable option for cars with higher horsepower requirements. It can be used on a variety of vehicles. The 4L80E is a popular option in many different types of vehicle. The vehicle's weight can be shifted from one gear to the next, with the torque converter clutch remaining locked to prevent overheating.
The 4L80E is also a good choice for heavy-duty vehicles. The 4L80E's torque converter clutch can fail and lock up, disconnecting power from the engine to the wheels. Moreover, the transmission is often able to shift to a different gear if the engine has been damaged. Nonetheless, it can also be a useful option for cars with low-performance budgets. So, if you're considering getting a new transmission for your vehicle, this is the way to go!