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:

Brake Booster - Vacuum (Description and Operation)
Power Brake Booster   The vacuum type power brake booster (2005): is a dual diaphragm, vacuum assisted power brake booster reduces brake pedal force and travel distance. is located on the LH side of the bulkhead in the engine compartment, be ...

Supercharger Cooling (Diagnosis and Testing)
Special Tool(s) Pressure Test Kit 014-R1072 or equivalent Battery/Antifreeze Tester 014-R1060 or equivalent Material Item Specification Motorcraft Premium Engine Coolant VC-4-A (in Oregon VC-5, in Canada C ...

Material
Item Specification Threadlock and Sealer E0AZ-19554-AA WSK-M2G351-A5 (type II) Shoulder Bolt Kit F5ZZ-76539A04-A - NOTE: Before starting the adjustment process, inspect the top for damage, make sure that the door window glass ...