Typical Faults:

1. Torque Converter Clutch (TCC) Shudder

   • Symptom: Vibration at 45-65 mph (P0741 code)

   • Cause: Worn friction material or contaminated Dexron VI

2. 1-2 Shift Solenoid Failure

   • Symptom: Harsh or delayed 1-2 shifts (P0751/P0756)

   • Trigger: Debris accumulation in valve body

3. Input Shaft Seal Leaks

   • Symptom: Low fluid level, pump whine

   • Root Cause: Seal hardening from heat cycles

Critical Checks:

• Fluid Condition: Brown/black = clutch material failure

• Line Pressure: <65 psi at idle indicates pump wear

• TCC Apply: Monitor slip RPM (>100 RPM = failure)

Pro Tip: Always flush cooler lines when replacing TC – debris recurrence is #1 killer of rebuilds