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.
Drive Range Fifth Gear - Torque Converter Clutch Applied: Notes
When the transmission control module (TCM) determines that the engine and transmission are operating properly to engage the torque converter clutch (TCC), the TCM regulates the duty cycle of the lock up pressure control solenoid valve (SLU).
At this time the Torque Converter Clutch is considered to be disengaged (OFF), lock up pressure control solenoid valve maintains a 90 percent duty cycle. TCM decision to apply the TCC. The following events occur in order to apply the torque converter clutch.
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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.