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:

Manual Transmission
The T56 six-speed manual transmission features the following: six forward speeds and one reverse speed. forward gears are synchronized and helical cut. a reverse gear operates through a constant-mesh, fully synchronized system. a shift interlock system ...

Under hood overview
3.7L V6 Engine A. Battery B. Engine oil dipstick C. Engine oil filler cap D. Brake fluid reservoir E. Air filter assembly F. Engine coolant reservoir G. Windshield washer fluid reservoir H. Power distribution box 5.0L V8 Engine A. Battery B. Engine oil fille ...

Symptom Chart
Condition Possible Sources Action Dogtracking Excessive rear thrust angle. Front or rear suspension components. Drive axle damaged. CHECK the wheel alignment. ADJUST as necessary INSPE ...