Whine Noise
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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.
Perform a stall test to make sure the noise is actually coming from the converter.
- Bring the vehicle to a complete stop using the service brake.
- Ensure that the engine is at low idle RPM.
- Put the transmission in P, PARK.
- Engage the P, PARK, range by slowly releasing the service brake.
- Apply the emergency brake and/or parking brake, if present, and ensure it is properly engaged.
- If the vehicle will be unoccupied with the engine running, chock the wheels and take any other steps necessary to keep the vehicle from moving.
- Place your foot on the brake.
- Place the range selector in DRIVE.
- Depress the accelerator to approximately 1,200 RPM for no more than 6 seconds. Listen for torque converter noise. A torque converter noise will increase under this load.
NOTE:
You may damage the transmission if you depress the accelerator for more than 6 seconds.