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:

Pinpoint Test M: DTC B1891 - Air Bag Tone Warning Indicator Circuit Shorted to Battery or Ignition
Normal Operation The restraints control module (RCM) monitors its connection to the generic electronic module (GEM) at pin 10. This connection is used to signal a chime if the air bag indicator is inoperative and another SRS fault exists. If the RC ...

Spring Lock Couplings
Special Tool(s) Disconnect Tool, Spring Lock Coupling (3/8 inch yellow) 310-D004 (D87L-9280-A) or equivalent Disconnect Tool, Spring Lock Coupling (1/2 inch green) 310-D005 (D87L-9280-B) or equivalent Material Item ...

Instrument Cluster (Description and Operation)
The instrument cluster (10849) consists of the following components: Instrument Cluster-Base 3.8L Engine   Instrument Cluster-Base 4.6L Engine   Instrument Cluster-Cobra   ...