Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.