Torque Converter Noise Evaluation

Torque converter whine is usually noticed when the vehicle is stopped and the transmission is in "Drive" or "Reverse." The noise will increase when engine rpm is increased. The noise will stop when the vehicle is moving or when the torque converter clutch is applied because both halves of the converter are turning at the same speed.

Perform a stall test to make sure the noise is actually coming from the converter:
1. Place foot on brake.
2. Put gear selector in "Drive" (D).
3. Depress accelerator to approximately 1200 rpm for no more than six seconds.

NOTICE: If the stall test is performed for more than six seconds, damage to the transmission may occur. A torque converter noise will increase under this load.

Important: This noise should not be confused with pump whine noise which is usually noticeable in "Park", "Neutral" and all other gear ranges. Pump whine will vary with pressure ranges.