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:

Cleaning the alloy wheels
Note: Do not use chrome cleaner, metal cleaner or polish on wheels and wheel covers. A clearcoat paint finish coats aluminum wheels and wheel covers. In order to maintain their condition: • Clean weekly with Motorcraft Wheel and Tire Cleaner. Use a sponge ...

Pinpoint Tests
PINPOINT TEST A: THE BRAKES PULL OR DRIFT Test Step Result / Action to Take A1 CHECK THE TIRES YesGO to A2 . No CORRECT as necessary. RETEST for normal operation. NOTE: Check tire pressure with the brakes off. Check tires for u ...

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 ...