GM Service Manual Online
For 1990-2009 cars only

Whine Noise Varying with RPM

Checks

Action

DEFINITION: In all ranges, a whine which may be sensitive to RPM load or which ceases when the torque converter clutch (TCC) engages.

Torque Converter (55)

Verify that the noise is internal to the torque converter by placing your left foot on the brake with the gear or selector in Drive. Momentarily stall the engine. Torque converter noise increases under load.