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:

Removal
CAUTION: Suspension fasteners are critical parts because they affect performance of vital components and systems and their failure can result in major service expense. A new part with the same part number must be installed if installation becomes necessary. ...

Crankshaft Front Oil Seal
Special Tool(s) Crankshaft Seal Installer/Aligner 303-335 (T88T-6701-A) Front Cover Seal Remover 303-107 (T74P-6700-A) Crankshaft Seal Installer 303-635 Crankshaft Damper Replacer 303-102 (T74P-6316-B) ...

Camshaft Runout
Special Tool(s) Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent 1. NOTE: Camshaft journals must be within specifications before checking runout. Use a Dial Indicator Gauge with Holding Fixture to measure the ...