Ford Mustang Service Manual: 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 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 also be damaged. Install a new axle shaft if any damage is detected.
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 d ...
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 ...
Other materials:
Engine
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 ...
Rear-view camera system
WARNING: The rear view camera system is a reverse aid supplement device
that still requires the driver to use it in conjunction with the interior and exterior
mirrors for maximum coverage.
WARNING: Objects that are close to either corner of the bumper or ...
Camshaft End Play - OHC Engines
Engine (Diagnosis and Testing)
Special Tool(s)
Commercially Available
Leakdown Tester
Quick Disconnect Compression
Tester
134-R0212 or equivalent
Dial Indicator Gauge Adapter
303-007 (TOOL-6565-AB) or
equivalent
Di ...