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:

Transmission fluid check
Checking Automatic Transmission Fluid Note: Transmission fluid should be checked and, if required, added by an authorized dealer. The automatic transmission does not have a transmission fluid dipstick. See your Scheduled Maintenance Information for scheduled ...

Input Shaft and Bearing
Special Tool(s) Input Shaft Seal Replacer 308-220 (T94P-7025-AH) Pinion Bearing Cone Remover 205-D002 (D79L-4621-A) or Equivalent Disassembly 1. Using the special tool and a press, remove the input bearing (7025). 2. Remove t ...

Pinpoint Tests
CAUTION: Before removing and installing the GEM or its connectors, disconnect the battery. Failure to follow this caution will result in the GEM storing many erroneous DTCs and it may exhibit erratic operation after installation. CAUTION: Be careful when pr ...