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:

Using the boot
Installing the Boot WARNING: Always secure the retaining clips and boot straps on the vehicle or the boot may come loose while driving. Note: Be sure the boot is secure on the vehicle before driving. Improper installation can result in loss or damage of the b ...

NVH Condition and Symptom Categories
A good diagnostic process is a logical sequence of steps that lead to the identification of a causal system. Use the condition and symptom categories as follows: Identify the operating condition that the vehicle is exhibiting. Match the operating condition ...

Anti-Theft - Passive Anti-Theft System (PATS) (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 112 , Anti-Theft for schematic and connector information. Refer to Wiring Diagrams Cell 60 , Instrument Cluster for schematic and connector information. Special Tool(s) 73III Automotive Meter 105-R0057 or equivalen ...