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:

Stub Shaft Pilot Bearing and Seal
Special Tool(s) Remover, Bearing Cup 308-047 (T77F-1102-A) Protector, Differential Seal (Pair) 205-461 Installer, Differential Oil Seal 205-293 (T89P-4850-A) Adapter for 303-224 (Handle) 205-153 (T80T-4000-W) ...

Horn (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 44 , Horns/Cigar Lighter for schematic and connector information. Special Tool(s) 73 Digital Multimeter or equivalent 105-R0051 Inspection and Verification 1. Verify the customer concern by operating the h ...

Valve - Seat Inspection
Valve and Seat Refacing Measurements CAUTION: After grinding valves or valve seats, check valve clearance. 1. Check the valve head and seat. Check valve angles. Check margin width. Refer to the appropriate section in Group 303 for the procedure. ...