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:

Output Shaft
Special Tool(s) Pinion Bearing Cone Remove 205-D002 (D79L-4621-A) or Equivalent Spiral Snap Ring Replacer 308-096 (T85P-7025-A) Disassembly 1. Using the special tool and a press, remove the third/fourth gear synchronizer asse ...

Differential Housing Cover
Removal 1. Raise and support the vehicle. 2. NOTE: Empty the lubricant into a clean container for reuse. Remove the differential housing cover (4033). 1. Remove the 10 bolts and drain the lubricant from the differential housing (4010). 2. Remove the d ...

Transmission Fluid Cooler
CAUTION: Whenever a transmission has been disassembled to install new parts, the cooler bypass valve (CBV), all transmission fluid coolers (in tank and auxiliary) and transmission fluid cooler lines must be cleaned and backflushed. Use a suitable the t ...