Ford Mustang (1999-2004) Service Manual: Gear Howl and Whine

Howling or whining of the ring gear and pinion is due to an incorrect gear pattern, gear damage or incorrect bearing preload.

Wheel Hub or Axle Flange Face Runout
NOTE: If the axle shaft assembly is removed, check runout of the shaft itself. The forged (unmachined) part of the shaft is allowed to have as much as 3.0 mm (0.120 inch) runout. This alone will not ...

Bearing Whine
Bearing whine is a high-pitched sound similar to a whistle. It is usually caused by worn/damaged pinion bearings, which are operating at driveshaft speed. Bearing noise occurs at all driving speeds. ...

Other materials:

Air filter check
WARNING: To reduce the risk of vehicle damage and or personal burn injuries, do not start your engine with the air cleaner removed and do not remove it while the engine is running. Note: Failure to use the correct air filter element may result in severe engin ...

Safety Precautions
WARNING: Never run the engine with one wheel off the ground, for example, when changing a tire. The wheel(s) resting on the ground could cause the vehicle to move. WARNING: The tire and wheel must always be correctly matched. It is very important to determ ...

Fuel Tank Filler Pipe
Removal 1. Remove the fuel tank. For additional information, refer to Fuel Tank in this section. 2. Remove the bolts from the filler pipe housing. 3. Remove the bolts from the filler pipe rubber boot-to-floor pan. 4. Remove the hose attached to the upper p ...