Jeep 1997 Grand Cherokee Service Manual page 119

SPECIAL TOOL C-3972–A
AXLE HOUSING
SPECIAL TOOL PINION YOKE C-4171
ZG
REMOVAL AND INSTALLATION (Continued)
Fig. 19 Pinion Seal Installation
Fig. 20 Pinion Yoke Installation
CAUTION: Never loosen
decrease pinion gear bearing rotating torque and
never exceed specified preload torque. If preload
torque or rotating torque is exceeded a new col-
lapsible spacer must be installed. The torque
sequence will then have to be repeated.
(9) Using yoke holder 6958, a short length of 1 in.
pipe, and a torque wrench set at 474 N·m (350 ft.
lbs.), crush collapsible spacer until bearing end play
is taken up (Fig. 21).
NOTE: If more than 474 N·m (350 ft. lbs.) of torque
is necessary to remove the bearing end play, the
collapsible spacer
replaced.
(10) Slowly tighten the nut in 6.8 N·m (5 ft. lbs.)
increments until the rotating torque is achieved.
Measure the rotating torque frequently to avoid over
crushing the collapsible spacer (Fig. 22).
pinion gear
is defective and must
SPECIAL TOOL
(11) Check rotating torque with an inch pound
torque wrench (Fig. 22). The torque necessary to
rotate the pinion gear should be:
• Original Bearings — The reading recorded dur-
ing removal, plus an additional 0.56 N·m (5 in. lbs.).
• New Bearings — 2 to 5 N·m (15 to 35 in. lbs.).
nut to
Fig. 22 Check Pinion Gear Rotation Torque
(12) Install differential assembly and axle shafts,
if necessary.
be
(13) Align marks made previously on yoke and
propeller shaft and install propeller shaft.
(14) Install rear brake rotors and calipers. Refer to
Group 5, Brakes, for proper procedures.
(15) Add gear lubricant, if necessary. Refer to
Lubricant Specifications of this section for lubricant
requirements.
1 in. PIPE
PINION YOKE INCH 6958 POUND WRENCH TORQUE
DIFFERENTIAL AND DRIVELINE
Fig. 21 Tightening Pinion Nut
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