Ford Mustang Service Manual: Chuckle

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


    Bearing Whine
    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 ...

    Knock
    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 ...

    Other materials:

    Removal
    Removal 1. Disconnect the battery ground cable. For additional information, refer to Section. 2. Drain the engine cooling system. For additional information, refer to Section . 3. Remove the crankshaft pulley. For additional information, refer to Cr ...

    Diagnostics
    Transmission Description (Description and Operation) The 4R70W has the following features: Wide ratio gears Four speeds Rear wheel drive Automatic Electronic shift Torque converter clutch control Line pressure controls The transm ...

    Final disassembly
    Disassembly Initial disassembly 1. Remove the differential housing cover (4033) and drain the lubricant into a suitable container. 2. Wipe the lubricant from the internal working parts and inspect the parts for wear and damage. 3. Using the special tool, m ...