Meaning

The TCM has detected clutch slip exceeding the allowable threshold for a prolonged period. The speed differential between the drive and driven sides exceeds design limits.

Common causes

• Worn or oil-contaminated clutch disc
• Insufficient hydraulic engagement pressure (internal leak or weak pump)
• Faulty clutch actuator unable to develop the required clamping force
• Worn diaphragm spring or deteriorated actuation mechanism
• Prolonged thermal overload of the clutch
• Incorrect TCM calibration or missing software update

Symptoms

• Transmission warning light on
• Burning smell from the clutch area
• Vehicle acceleration lags behind engine speed (slipping sensation)
• High transmission temperature reported by diagnostic tool
• Slow or imprecise gear changes
• Possible activation of limp mode

Severity

What to do

1. Capture live data (slip rate, clutch temperature, pressures) with a diagnostic tool
2. Check transmission fluid level and condition; look for signs of contamination
3. Measure hydraulic pressure in the clutch circuit and compare to specifications
4. Inspect the clutch actuator and associated solenoids
5. If pressure is within spec, evaluate replacement of the clutch pack

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