Jeep Grand Cherokee WK. Manual — part 79
6. Install proper thickness depth shim (1) on pinion
gear (2).
7. Install rear bearing (4) and slinger if equipped, on
pinion gear (3) with Installer 6448A (2) and a press
(1).
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REAR AXLE - C213R
WK
8. Install new collapsible spacer (1) on pinion gear
and install pinion in housing.
9. Tap pinion flange onto the pinion.
10. Install flange washer and a new nut on pinion and
tighten pinion nut until there is zero end-play.
11. With a torque wrench and Flange Wrench C-3281
tighten the pinion nut to 285 N·m (210 ft. lbs.).
CAUTION: Never loosen pinion nut to decrease
pinion bearing rotating torque and never exceed
specified preload torque. If preload torque or rotat-
ing torque is exceeded a new collapsible spacer
must be installed. Failure to follow these instruc-
tions will result in damage.
12. Slowly tighten the nut in 6.8 N·m (5 ft. lbs.) incre-
ments
until
the
desired
rotating
torque
is
achieved. Measure rotating torque frequently with
an inch pound torque wrench (2) to avoid over
crushing the collapsible spacer.
13. The pinion rotating torque should be:
•
Original Bearings: 1 to 3 N·m (10 to 20 in. lbs.).
•
New Bearings: 2 to 5 N·m (15 to 35 in. lbs.).
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REAR AXLE - C213R
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14. Position exciter ring on differential case. With a
brass drift slowly and evenly tap the exciter ring
into position.
15. Position ring gear on the differential case and
start two ring gear bolts. This will provide case-to-
ring gear bolt hole alignment.
16. Invert the differential case in the vise.
17. Install new ring gear bolts (2) and alternately
tighten to 102 N·m (75 ft. lbs.).
CAUTION: Never reuse the ring gear bolts. Failure
to follow these instructions may result in fractured
bolts causing extensive damage.
18. Install differential in housing and verify gear mesh,
backlash and contact pattern.
19. Install differential cover.
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REAR AXLE - C213R
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REAR AXLE - C213RE
TABLE OF CONTENTS
page
page
REAR AXLE - C213RE
. . . . . . . . . . . . . . . . . 217
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
. . . . . . . . . . . . . . . . . . . . . . . . 226
. . . . . . . . . . . . . . . . . . . . . . . 231
. . . . . . . . . . . . . . . . . . . . . . 238
. . . . . . . . . . . . . . . . . . . . . . . 239
DIFFERENTIAL COVER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
. . . . . . . . . . . . . . . . . . . . . . . . 242
AXLE SHAFTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
. . . . . . . . . . . . . . . . . . . . . . . . 245
AXLE BEARINGS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
. . . . . . . . . . . . . . . . . . . . . . . . 250
AXLE SHAFT SEALS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
. . . . . . . . . . . . . . . . . . . . . . . . 254
PINION SEAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
. . . . . . . . . . . . . . . . . . . . . . . . 257
DIFFERENTIAL-ELSD
. . . . . . . . . . . . . . . . . . . . . . . . . . 258
. . . . . . . . . . . . . . . . . 258
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
. . . . . . . . . . . . . . . . . . . . . . . . 260
BEARINGS-DIFFERENTIAL CASE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
. . . . . . . . . . . . . . . . . . . . . . . . 263
PINION GEAR/RING GEAR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
. . . . . . . . . . . . . . . . . . . . . . . . 267
REAR AXLE - C213RE
DIAGNOSIS AND TESTING
REAR AXLE - C213RE
GEAR NOISE
Axle gear noise can be caused by insufficient lubricant, incorrect backlash, incorrect pinion depth, tooth contact,
worn/damaged gears, or the carrier housing not having the proper offset and squareness.
Gear noise usually happens at a specific speed range. The noise can also occur during a specific type of driving
condition. These conditions are acceleration, deceleration, coast, or constant load.
When road testing, first warm-up the axle fluid by driving the vehicle at least 5 miles and then accelerate the vehicle
to the speed range where the noise is the greatest. Shift out-of-gear and coast through the peak-noise range. If the
noise stops or changes greatly check for:
•
Insufficient lubricant.
•
Incorrect ring gear backlash.
•
Gear damage.
Differential side and pinions gears, usually do not cause noise during straight-ahead driving, when the gears are
unloaded. The side gears are loaded during turns. A worn pinion mate shaft can also cause a snapping or a knock-
ing noise.
BEARING NOISE
Bearing noise can be either a whining or a growling sound.
Pinion bearings have a constant high pitch noise, because it rotates at a faster rate. This noise changes with
vehicle speed. If noise is heard under a load, the rear pinion bearing is the source. If noise is heard during a coast,
the front pinion bearing is the source.
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