General System Description

HYDRA-MATIC 4T60-E Automatic Transaxle.:

PCM Input/Output Control Of Transmission.:

Solenoid Operation.:

PCM Wiring:

The HYDRAMATIC 4T60-E transmission is electronically controlled by the Powertrain Control Module (PCM). Transmission shifts are carried out by electro-hydraulic solenoids as requested by the PCM. Inputs to the PCM determine the shift pattern and Viscious Converter Clutch (VCC) operation.

Four solenoids in the transaxle respond to the PCM signals. Two solenoids, SHIFT A and SHIFT B, control shifts. The VCC APPLY and VCC Pulse Width Modulation (VCC MOD or PWM MOD) solenoids control the apply and release of the VCC.

There are no trouble codes for the shift solenoids. PCM code E39 indicates a VCC fault.