DEFINITION: In all ranges, a whine which may be sensitive to RPM load, or which ceases when the TCC engages, or which is sensitive to the oil pressure

Torque Converter (1)

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.

Oil Pump System

Verify that the noise is internal to the oil pump during a preliminary oil pressure check. An increase in line pressure will vary an oil pump noise.

OSS

Verify the noise is internal to the rear of the transmission. To diagnose this condition, shim the output speed sensor away from the extension housing and drive the vehicle. If the noise is no longer present, the speed sensor was contacting the rotor and the extension housing should be replaced.