Overhaul - 4T60-E: Description

The Hydra-Matic 4T60-E transaxle is a fully automatic 4-speed unit consisting primarily of a 3-element hydraulic torque converter and converter clutch. Transaxle uses a variable capacity vane-type pump to supply all hydraulic pressure needed for operation.

The multiplied torque from torque converter is transferred to the transaxle by a sprocket and link chain assembly. Other internal components consist of 4 multiple-disc clutches, a roller clutch, a sprag clutch, 3 bands and a compound planetary gear set. The final drive gear and differential assemblies are an integral part of the transaxle.

The 4T60-E uses 2 electronic shift valves, controlled by the Powertrain Control Module (PCM), to switch hydraulic pressure on or off. Another electronic solenoid controls Torque Converter Clutch (TCC) lock-up. Some models also use a Pulse Width Modulated (PWM) solenoid to control rate of TCC apply.