Jeep 1997 Grand Cherokee Service Manual page 156

PINION YOKE
SPECIAL TOOL C-3718
3 - 98 DIFFERENTIAL AND DRIVELINE
REMOVAL AND INSTALLATION (Continued)
Fig. 20 Pinion Yoke Installation
(7) Install the yoke washer and a new nut on the
pinion gear. Tighten the nut to 298 N·m (220 ft. lbs.)
minimum. Do not over–tighten. Maximum torque
is 380 N·m (280 ft. lbs.).
CAUTION: Never loosen
decrease pinion gear bearing rotating torque and
never exceed specified preload torque. If preload
torque is exceeded a new collapsible spacer must
be installed. The torque sequence will then have to
be repeated.
NOTE: If the spacer requires more than 280 ft. lbs.
torque to crush, the collapsible spacer is defective.
(8) 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. 21).
(9) 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).
(10) 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.).
(11) Install differential assembly and axle shafts, if
necessary.
(12) Align marks made previously on yoke and
propeller shaft and install propeller shaft.
(13) Install rear brake rotors and calipers. Refer to
Group 5 Brakes, for proper procedures.
(14) Add gear lubricant, if necessary. Refer to
Lubricant Specifications of this section for lubricant
requirements.
(15) Install wheel and tire assemblies.
pinion gear nut to
1 in. PIPE
SPECIAL TOOL PINION YOKE INCH 6958
Fig. 21 Tightening Pinion Nut
Fig. 22 Check Pinion Gear Rotation Torque
(16) Lower vehicle.
AXLE SHAFT
REMOVAL
(1) Raise and support vehicle. Ensure that the
transmission is in neutral.
(2) Remove wheel and tire assembly.
(3) Remove brake caliper and rotor. Refer to Group
5, Brakes, for proper procedure.
(4) Clean all foreign material from housing cover
area.
(5) Loosen housing cover bolts. Drain lubricant
from the housing and axle shaft tubes. Remove hous-
ing cover.
POUND WRENCH TORQUE
ZG