General Description

Fig. 2 Cross-sectional View Of 4L80-E And 4L80-EHD Transmission:

This model is a fully automatic rear wheel drive electronically controlled
transmission, Fig. 2. Its major components consist of a 3-element torque converter, including a [1][2]torque converter clutch and dual stators, three planetary gear sets and five multiple disc type clutches. Oil pressure is from a gear type oil pump and regulated by a force motor solenoid.
Shift points are controlled by the vehicles computer and are based on throttle angle and vehicle speed. When the computer says a shift should occur, an electrical signal is sent to the shift solenoids which in turn move the valves to perform the shift.