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 System (Description and Operation)
Component Locations +   The vehicle is equipped with a vacuum-assisted or a hydro-boost power braking system. The braking system is a front-to-rear split hydraulic system. The front wheel brakes utilize a dual piston brake caliper and disc brake sy ...

Oil Pan
Special Tool(s) Compressor, Coil Spring 204-D001 (D78P-5310-A) Lifting Bracket, Engine 303-D088 (D93P-6001-A2) 3-Bar Engine Support Kit 303-F072 Material Item Specification Metal Surface Cleaner F4 ...

Engine (Disassembly)
Special Tool(s) Impact Slide Hammer 100-001 (T50T-100-A) Remover, Crankshaft Rear Oil Slinger 303-514 (T95P-6701-AH) Remover, Crankshaft Rear Oil Seal 303-519 (T95P-6701-EH) Remover, Crankshaft Vibration ...