GM 4L80-E transmission


The 4L80-E was a series of heavy-duty automatic transmissions from General Motors designed for longitudinal engine configurations. The 4L80-E was heavily based on the Turbo-Hydramatic 400 first produced in October 1963, adding electronic controls and an overdriven fourth gear. 4L80-Es were optioned only in Chevrolet/GMC pickups,2500 Suburbans, vans, and commercial vehicles, and the Hummer H1. It was also adopted by Rolls Royce in 1991 and modified after extensive testing, and used initially in the Bentley Continental R, and subsequently other Rolls Royce and Bentley vehicles. The 4L80E and 4L85E were built at Willow Run Transmission in Ypsilanti, Michigan.
Gear ratios:

4L80-E

The 4L80-E is rated to handle engines with up to 440 ft·lbf of torque. The 4L80-E is rated to max GVWR of 18,000
The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. By activating and deactivating the solenoids in a predetermined pattern by the PCM, 4 distinct gear ratios can be achieved. The shift solenoid pattern, also sometimes referred to as solenoid firing order, is as follows;

Shift Solenoid Pattern

Applications

The 4L85-E is rated to handle vehicles with up to 690 ft·lbf of torque . The 4L85E is rated to handle vehicles with a GVWR of up to 18,000 lbs
Applications: