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.
Torque Converter Clutch (TCC)
The ECM controls a solenoid mounted in the transmission to allow the torque converter to directly connect the engine to the transmission. When vehicle speed is high enough, the ECM energizes the TCC solenoid and the engine is mechanically connected to the transmission.
When operating conditions indicate that the transmission should operate as normal, the TCC solenoid is de-energized. This allows the transmission to return to normal automatic operation. The transmission will also return to normal automatic operation when the brake pedal is depressed.
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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.