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:

Inspection and Verification
1. Verify the customer concern. 2. Visually inspect for obvious signs of electrical damage. Visual Inspection Chart Electrical Central junction box (CJB) Fuse 31 (5A) Damaged wiring harness Loose or corroded connections ...

Piston Inspection
Special Tool(s) Scraper, Piston Ring Groove 303-D033 (D81L-6002-D) or equivalent CAUTION: Do not use a caustic cleaning solution or a wire brush to clean the pistons or damage can occur. 1. Clean and inspect the (1) ring lands, (2) skirts, ...

Wheel Knuckle - Cobra
Special Tool(s) Front Hub Remover 205-D070 (D93P-1175-B) or Equivalent Steering Arm Remover 211-003 (T64P-9171-A) ...