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.
Cadillac (FWD Models Except Cimarron)
The THM 440-T4 is equipped with a thermistor switch that senses the temperature of the transaxle fluid. This information is sent to the ECM for Viscous Converter Clutch (VCC) operation. The ECM will engage the VCC when fluid temperature is 200°F (93°C) or less, provided all other conditions have been met. If fluid temperature is higher than this, ECM will not allow VCC engagement until vehicle speed is about 36 MPH.
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Use the Manual With the Right Hardware
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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.