Ford COUGAR 1968 Shop Manual page 114

GROUP 4
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Rear
Axle
FIG.
15-Rear Axle Diagnosis Guide (Continued)
EXCESSIVE REAR AXLE
BACKLASH (ALL REAR
AXLES)
O N E WHEEL SPINS
EXCESSIVELY (LIMITED-SLIP
DIFFERENTIAL O N L Y )
AXLE H A S A
HIGH-PITCHED, CHATTERING
N O I S E ON TURNS
(LIMITED-SLIP DIFFERENTIAL
ONLY)
J
1
Excessive backlash in the axle tween the drive pinion and ring gear,
driving parts may be caused by worn excessive backlash in the differential
axle shaft splines, loose axle shaft gears, or bearings which are worn or
flange nuts, loose U-joint flange out of adjustment.
mountings, excessive backlash be-
Use the procedure given unde,r [he specified minimum, the differen-
limited-slip differential for checking tial is not functioning properly. To
the locking differential while the unit repair the unit, remove it from the
is in the vehicle. If the torque required
axle housing.
to rotate one rear wheel is less than
Drive the vehicle in a fairly tight
tion plates installed. The axle hous-
circle, making five circles clockwise and ing must be cleaned and flushed.
five counterclockwise. This will per- Note: New friction plates must be
mit the lubricant to work in between soaked for 112 hour in C6AZ-19580-C
the clutch plates. If the noise does (ESW-M20104-A) lubricant.
not disappear during this driving test, After refilling the axle with proper
it is probable that the axle does not lubricant, drive the vehicle in fairly
have thz approved Ford lubricant, or tight circles clockwise and counter-
has improperly assembled differential clockwise. The chattering noise should
clutch plates. disappear as soon as the new lubri-
The differential carrier must be cant works in between the clutch
disassembled, cleaned, and new fric- plates.
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