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:

Camshaft End Play - Push Rod Engines
Special Tool(s) Dial Indicator Gauge with Holding Fixture 100-002 (TOOL-4201-C) or equivalent 1. Remove the valve tappets. Refer to the appropriate section in Group 303 for the procedure. 2. Use a Dial Indicator Gauge with Holding Fixture ...

Driveshaft (Removal and Installation)
Material Item Specification Threadlock and Sealer E0AZ-19554-AA WSK-M2G351-A5 (type II) Removal and Installation 1. Raise and support the vehicle. 2. Carry out the following: 1. Place an index mark on the rear axle pinion flange and ...

Component Tests
Driveline Vibration An analysis of driveline vibration can also be conducted using the Vibration Analyzer; follow the manufacturer's directions. Driveline vibration exhibits a higher frequency and lower amplitude than does high-speed shake. Driveline vibra ...