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:

Differential Case and Ring Gear - Conventional
Special Tool(s) 2-Jaw Puller 205-D072 (D97L-4221-A) or equivalent Installer, Differential Side Bearing 205-010 (T57L-4221-A2) Step Plate 205-D061 (D83T-4205-C2) or equivalent ...

Dual Converter Y-Pipe - 3.8L
Removal NOTE: The RH and LH catalytic converters are serviceable separately. 1. Raise and support the vehicle. For additional information, refer to Section. 2. CAUTION: When repairing the exhaust system or removing exhaust components, disconnect all heated o ...

Component Tests
Battery-Load Test 1. With the engine running, turn the A/C on, the blower motor on high speed and the headlamps on high beam. 2. Increase the engine speed to approximately 2,000 rpm. The voltage should increase a minimum of 0.5 volt above the ba ...