Operation CHARM: Car repair manuals for everyone.

Noise Conditions

Gear Noise - a whine most noticeable in the 1st and Reverse gears that is related to vehicle speed. A gear noise condition may become less noticeable or disappear after an upshift.

Pump Noise - a high pitched whine increasing in intensity with engine RPM. This condition can be noticeable in Park and Neutral with the vehicle standing still.