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:

Runout Check - Brake Disc and Hub
Special Tool(s) Brake Measurement Kit 134-R0199 or equivalent Material Item Specification High Temperature Nickel Anti- Seize Lubricant F6AZ-9L494-AA ESE-M12A4- A CAUTION: The brake disc (1126) runout specification must ...

Pinpoint Tests
PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE Test Step Result / Action to Take A1 CHECK THE SPEED CONTROL SERVO VOLTAGE AND GROUND YesGO to A3 . No GO to A2 . Key in OFF position. Disconnect: Speed Control Servo C122. ...

Hill start assist
WARNING: The hill start assist feature does not replace the parking brake. When you leave the vehicle, always apply the parking brake and shift the transmission into position P for automatic transmission or position 1 for manual transmissions. WARNING: You mus ...