Jeep 1997 Grand Cherokee Service Manual page 164

PINION YOKE 1 in. PIPE
SPECIAL TOOL SPECIAL TOOL C-3718 6958
3 - 106 DIFFERENTIAL AND DRIVELINE
REMOVAL AND INSTALLATION (Continued)
Fig. 48 Pinion Yoke Installation
CAUTION: Never loosen
decrease pinion gear bearing preload torque and
never exceed specified preload torque. If preload
torque is exceeded a new collapsible spacer must
be installed. The torque sequence will have to be
repeated.
NOTE: If the spacer requires more than 280 ft. lbs.
torque to crush, the collapsible spacer is defective.
(10) Using yoke holder 6958, a short length of 1 in.
pipe, and a torque wrench set at 380 N·m (280 ft.
lbs.), crush collapsible spacer until bearing end play
is taken up (Fig. 49).
(11) 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. 50).
Fig. 49 Tightening Pinion Nut
(12) Check bearing rotating torque with an inch
pound torque wrench (Fig. 50). The torque necessary
to rotate the pinion gear should be:
pinion gear nut to
PINION YOKE INCH
• Original Bearings — 1 to 3 N·m (10 to 20 in.
lbs.).
• New Bearings — 2 to 5 N·m (15 to 35 in. lbs.).
Fig. 50 Check Pinion Gear Rotation Torque
(13) Align previously made marks on yoke and
propeller shaft and install propeller shaft.
(14) Install differential housing into the axle hous-
ing.
FINAL ASSEMBLY
(1) Scrape the residual sealant from the housing
and cover mating surfaces. Clean the mating surfaces
with mineral spirits. Apply a bead of Mopar Silicone
Rubber Sealant, or equivalent, on the housing cover
(Fig. 60).
Install the housing cover within 5 minutes
after applying the sealant.
(2) Install the cover on the differential with the
attaching bolts. Install the identification tag. Tighten
the cover bolts to 41 N·m (30 ft. lbs.) torque.
CAUTION: Overfilling the differential can result in
lubricant foaming and overheating.
(3) Refill the differential housing with gear lubri-
cant. Refer to the Lubricant Specifications section of
this group for the gear lubricant requirements.
(4) Install the fill hole plug.
POUND WRENCH TORQUE
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