Ford Mustang Service Manual: Component Tests

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.

This distinguishes it from gear whine which usually comes and goes as speed changes.

As noted, pinion bearings make a high-pitched, whistling noise, usually at all speeds. If however there is only one pinion bearing that is worn/damaged, the noise may vary in different driving phases. If pinion bearings are scored or damaged or there is a specific pinion bearing noise, new pinion bearings must be installed. A worn/damaged bearing will normally be obvious at disassembly. Examine the large end of the rollers for wear. If the pinion bearings original blend radius has worn to a sharp edge, a new pinion bearing must be installed.

NOTE: A low-pitched rumble normally associated with a worn/damaged wheel bearing can also be caused by tires.

A wheel bearing noise can be mistaken for a pinion bearing noise. Check the wheel bearing for a spalled cup, and spalled/damaged rollers. Check the wheel bearing for rotating smoothness and end play. Install a new wheel bearing if any of these concerns are detected.

If the wheel bearing is damaged, the roller surface on the axle shaft may


If the wheel bearing is damaged, the roller surface on the axle shaft may also be damaged. Install a new axle shaft if any damage is detected.

Chuckle


    Symptom Chart
    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 d ...

    Driveline Angle Inspection
    Driveline System Special Tool(s) Clamp Plate 205-320 (T92L-4851-C) Clutch Housing Alignment Adapter 308-021 (T75L-4201-A) Companion Flange Holding Tool 205 ...

    Other materials:

    Booster seats
    WARNING: Never place, or allow a child to place, the shoulder belt under a childs arm or behind the back because it reduces the protection for the upper part of the body and may increase the risk of injury or death in a crash. Use a belt-positioning boos ...

    Motor - Windshield Wiper
    Wipers and Washers (Diagnosis and Testing) Refer to Wiring Diagrams Cell 59 , Generic Electronic Module for schematic and connector information. Refer to Wiring Diagrams Cell 81 , Interval Wiper/Washer for schematic and connector information. Sp ...

    Engine Front Cover
    Engine WARNING: Do not operate the engine with the hood open until the fan blade has been first examined for possible cracks and separation. The 4.6L (4V) (281 CID) is a V-8 engine with the following features: dual overhead camshafts four valves per cyl ...