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:

Crankshaft Rear Oil Seal
Special Tool(s) Installer, Crankshaft Rear Oil Seal 303-518 (T95P-6701-DH) Remover, Crankshaft Rear Oil Seal 303-519 (T95P-6701-EH) Installer, Crankshaft Rear Oil Seal 303-516 (T95P-6701-BH) Remover ...

Deactivation
WARNING: Always wear safety glasses when repairing an air bag supplemental restraint system (SRS) vehicle and when handling an air bag module. This will reduce the risk of injury in the event of an accidental deployment. WARNING: Carry a live air ...

Parking Brake (Description and Operation)
  The parking brake system is cable-actuated and controlled by an independent hand-operated parking brake control (2780). To apply parking brake, pull parking brake control upward as far as possible. The parking brake system is an AUTO-ADJUST system ...