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:

Road Test
Verify the customer concern by carrying out a road test on a smooth road. If any vibrations are apparent. To maximize tire performance, inspect for signs of incorrect inflation and uneven wear, which may indicate a need for balancing, rotation, or front susp ...

Component Tests
Battery-Load Test 1. With the engine running, turn the A/C on, the blower motor on high speed and the headlamps on high beam. 2. Increase the engine speed to approximately 2,000 rpm. The voltage should increase a minimum of 0.5 volt above the ba ...

Installation
Lift cylinder 1. NOTE: Be sure that each fitting is installed in the correct position on the folding top hydraulic component. NOTE: Make sure that the tetra seal is installed in the bottom of each of the folding top hydraulic cylinder ports before attaching ...