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:

Canister Vent Solenoid Closing Procedure
Special Tool(s) Worldwide Diagnostic System (WDS) 418-F224, New Generation STAR (NGS) Tester 418-F052, or equivalent scan tool CAUTION: The canister vent solenoid must not be energized for more than nine minutes at one time. Once the ...

Cleaning products
For best results, use the following products or products of equivalent quality: Motorcraft Bug and Tar Remover (ZC-42) Motorcraft Custom Bright Metal Cleaner (ZC-15) Motorcraft Detail Wash (ZC-3-A) Motorcraft Dusting Cloth (ZC-24) Motorcraft Engine Shampoo and ...

Valve - Springs, Retainer and Valve Stem Seal
Special Tool(s) Compressor, Valve Spring 303-452 (T93P-6565-AR) Installer, Valve Stem Oil Seal 303-383 (T91P-6571-A) Compressor, Valve Spring 303-567 (T97P-6565-AH) Spacer, Valve Spring Compressor 303 ...