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:

Rear Window Glass
Special Tool(s) Rotunda Pneumatic Knife with Offset Blade 107-R1511 or equivalent The Pumper 164-R2459 or equivalent Rotunda Interior Auto Glass Cut-Out Knife Kit 164-R2450 or equivalent ...

Camshaft
Special Tool(s) Holding Tool, Camshaft 303-446 (T93P-6256-AHR) Material Item Specification Super Premium SAE 5W-20 Engine Oil XO-5W20-QSP or equivalent WSS-M2C153- H ...

Noise, Vibration and Harshness (NVH) (Diagnosis and Testing)
Special Tool(s) ChassisEAR 107-R2102 or equivalent Electronic Vibration Analyzer 100-F027 (014-00344) or equivalent EngineEAR 107-R2100 or equivalent Ultrasonic Leak Detector 134-R0135 or equivalent T ...