Typical Faults:

1. Lockup Clutch Failure

   • Symptom: Shudder at 45-65 mph (P0741/P0740 codes)

   • Cause: Worn friction material or contaminated fluid

2. Stator One-Way Clutch Slippage

   • Symptom: Poor acceleration, overheating

   • Trigger: Broken sprag springs or roller damage

3. Seal Leaks

   • Symptom: Fluid contamination (pump whine, P0841)

   • Root Cause: Hardened seals from excessive heat

Critical Checks:

• Endplay: >0.5mm indicates bushing wear

• Clutch Drag Test: Should freewheel when reversed

• Debris: Always inspect converter when replacing pump

Pro Tip: Cut open failed converters – impeller blade damage reveals pump wear patterns.