Ford 2003 Mustang Workshop Manual page 266

Inspection and Verification
Certain axle noise or vibration symptoms are also common to the engine, transmission, wheel
bearings, tires, and other parts of the vehicle. For this reason, be sure that the cause of the trouble is
in the axle before disassembling, adjusting or repairing the axle. Refer to
Certain driveshaft vibration symptoms are common to the front engine accessory drive (FEAD), the
engine, transmission or tires. Be sure the cause of the concern is the driveshaft before repairing or
installing a new driveshaft. Refer to
Certain symptoms may be caused by Traction-Lok® differentials (4026). Check the vehicle certification
label and axle identification tag to determine the type of differential. Refer to
Noise Acceptability
NOTE: A gear-driven unit will produce a certain amount of noise. Some noise is acceptable and
audible at certain speeds or under various driving conditions such as a newly paved blacktop road.
Slight noise is not detrimental to the operation of the axle and is considered normal.
With the Traction-Lok® differential axle, slight chatter noise on slow turns after extended highway
driving is considered acceptable and has no detrimental effect on the locking axle function.
Universal Joint (U-Joint) Inspection
Place the vehicle on a frame hoist and rotate the driveshaft (4602) by hand. Check for rough operation
or seized U-joints. Install a new U-joint if it shows signs of seizure, excessive wear, or incorrect
seating. Refer to Section 205-01
Analysis of Leakage
Clean up the leaking area enough to identify the exact source. An axle leak can be caused by the
following.
Axle lubricant level is too high.
Worn or damaged axle shaft seals or differential seals.
Differential housing is cracked.
Flange yoke seat is worn or damaged.
Pinion flange is scored or damaged.
Axle cover is not sealed.
Vent is plugged.
Section 100-04 .
.
Section 100-04 .
Section 100-01 .