Automatic Transaxle Overhaul & Testing - 4T60-E: Description

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 oil pump to supply all hydraulic pressure needed for operation.

Multiplied torque from torque converter is transferred to transaxle by a sprocket and drive 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. Final drive gear and differential assemblies are an integral part of transaxle.

Transaxle uses 2 electronic shift solenoids, controlled by the Powertrain Control Module (PCM), to switch hydraulic pressure on or off. Another electronic solenoid controls Torque Converter Clutch (TCC) lock-up. A Pulse Width Modulated (PWM) solenoid is used to control rate of TCC apply.