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Home >> Pontiac >> 2008 >> G8 Base >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 5L40-E/5L50-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information and Procedures >> Torque Converter Diagnosis >> Noise

Torque Converter Diagnosis: Noise

IMPORTANT: Do not confuse this noise with pump whine noise, which is usually noticeable in PARK, NEUTRAL and all other gear ranges. Pump whine will vary with line pressure.

You may notice a torque converter whine when the vehicle is stopped and the transmission is in DRIVE or REVERSE. This noise will increase as you increase the engine RPM. The noise will stop when the vehicle is moving or when you apply the torque converter clutch, because both halves of the converter are turning at the same speed.

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