Page 1545 of 4284

(3) Remove shock absorber lower mounting bolt.
NOTE: If shock absorber bolt deflects upward dur-
ing removal, raise axle by adjusting support jack. If
shock absorber bolt deflects downward during
removal, lower axle by adjusting support jack (or by
pulling on axle).
(4) Remove four bolts securing leaf spring front
mounting bracket to the body (Fig. 3).
(5) Using jack,slowlylower rear axle, permitting
the forward end of rear spring to hang down. Lower
it enough to allow access to spring pivot bolt. It may
be necessary to place a wooden block between the
spring and vehicle to hold forward end of the spring
in place.
(6) Remove leaf spring forward pivot bolt, then
remove mounting bracket.
(7) Straighten the retainer tabs on the bushing
(Fig. 4).
(8) Place Remover/Installer, Special Tool 8459 on
leaf spring and bushing as shown (Fig. 5) and tighten
Set Screw securing Remover Plate to tool threaded
shaft.
(9) Tighten nut (Fig. 5), removing bushing from
spring eye.
(10) Remove the tool from spring, then remove
bushing from tool.
INSTALLATION - LEAF SPRING FRONT
BUSHING
(1) Install by hand NEW bushing in left side of
leaf spring eye.
(2) Place Remover/Installer, Special Tool 8459 on
leaf spring and bushing as shown (Fig. 6) and tightenSet Screw securing Installer Plate (8459±3) to tool
threaded shaft.
(3) Tighten nut (Fig. 6), installing bushing in
spring eye. Tighten nut until bushing is fully seated
and bushing flange bottoms against spring eye. Do
not over-tighten causing tool and bushing to bind.
(4) Remove Remover/Installer from the bushing
and leaf spring.
(5) Bend the retainer tabs on bushing outward
against spring eye.
(6) Position spring mounting bracket over spring
eye and install pivot bolt through center of bushing
from theoutboardside.
NOTE: The pivot bolt must be installed from the
outboard side to allow proper bracket to body
mounting.
(7) Install the nut on the pivot bolt and lightly
tighten. Do not fully tighten bolt at this time.
(8) Raise the under-hoist utility jack or transmis-
sion jack, guiding the forward mounting bracket into
place against the body. It may help to use a drift
punch placed through the hole centered between the
mounting bolt holes in the bracket and the pilot hole
in the body of the vehicle as a guide. When the four
mounting bolt holes line up with their threads in the
Fig. 4 STRAIGHTENED RETAINING TABS
1 - SPRING EYE
2 - RETAINING TABS
Fig. 5 TOOL 8459 MOUNTED FOR BUSHING
REMOVAL
1 - BUSHING
2 - BEARING
3 - WASHER
4 - NUT
5 - BODY (8459-1)
6 - PIN
7 - REMOVER PLATE (8459-2)
8 - SET SCREW
RSREAR2-29
BUSHINGS (Continued)
Page 1546 of 4284

body, Install the mounting bolts (Fig. 3). Tighten the
four mounting bolts to 61 N´m (45 ft. lbs.) torque.
(9) Raise or lower the jack until shock absorber
lower eye aligns with threads in axle housing. Install
shock absorber lower mounting bolt. Do not fully
tighten bolt at this time.
(10) Lower the vehicle and remove hoist arms and
block of wood from under vehicle.
(11) Tighten the spring front pivot bolt to 156 N´m
(115 ft. lbs.) torque.
(12) Tighten the lower shock absorber mounting
bolt to 102 N´m (75 ft. lbs.) torque.
HUB / BEARING
DESCRIPTION
The rear wheel bearing and rear wheel hub of this
vehicle are a one-piece sealed unit, or hub and bear-
ing unit type assembly. The hub and bearing is
mounted to the center of the rear axle using 4
mounting bolts. It has five wheel mounting studs on
the hub flange.
All-Wheel-Drive vehicles have a hub and bearing
unit with a splined hole in the center of the hub for
rear driveshaft stub axle acceptance.Front-Wheel-Drive vehicles with antilock brakes
have an internally mounted wheel speed sensor and
tone wheel. This hub and bearing can be identified
by the rounded cap and molded in connector on the
rear of the assembly (Fig. 7). The sensor and tone
wheel cannot be serviced separately from the hub
and bearing.
OPERATION
The hub and bearing has internal bearings that
allow the hub to rotate with the tire and wheel
assembly (and driveshaft on All-Wheel-Drive vehi-
cles). The five wheel mounting studs mount the tire
and wheel assembly, and disc brake rotor to the vehi-
cle.
On All-Wheel-Drive vehicles, the splined mating of
the driveshaft stub axle and hub allows the drive-
shaft to rotate with the hub and wheel.
Front-Wheel-Drive vehicles equipped with antilock
brakes have a wheel speed sensor and tone wheel
mounted to the rear of the hub and bearing. The tone
wheel rotates with the hub which is sensed by the
wheel speed sensor.
DIAGNOSIS AND TESTING - HUB AND
BEARING (REAR)
The bearing contained in the hub and bearing
assembly will produce noise and vibration when worn
or damaged. The noise will generally change when
the bearings are loaded. A road test of the vehicle is
normally required to determine the location of a
worn or damaged bearing.
Find a smooth level road surface and bring the
vehicle up to a constant speed. When vehicle is at a
constant speed, swerve the vehicle back and forth
from the left and to the right. This will load and
Fig. 6 TOOL 8459 MOUNTED FOR BUSHING
INSTALLATION
1 - NUT
2 - WASHER
3 - BEARING
4 - LEAF SPRING EYE
5 - BUSHING
6 - INSTALLER PLATE (8459-3)
7 - PIN
8 - BODY (8459-1)
Fig. 7 HUB AND BEARING - FWD WITH ABS
2 - 30 REARRS
BUSHINGS (Continued)
Page 1547 of 4284

unload the bearings and change the noise level.
When bearing damage is slight, the noise is usually
not noticeable at speeds above 48 km/h (30 mph).
REMOVAL - HUB AND BEARING
FRONT-WHEEL-DRIVE VEHICLES
(1) Raise vehicle. See Hoisting in Lubrication and
Maintenance.
(2) Remove wheel and tire.
(3) Remove brake drum or disc brake caliper and
rotor from hub and bearing. Refer to Brakes.
(4) If equipped with antilock brakes, perform the
following:
(a) Remove secondary (yellow) retaining clip at
rear of wheel speed sensor head (Fig. 8).
(b) Push up on metal retaining clip (Fig. 8) until
it bottoms. This will release wheel speed sensor
head from hub and bearing.
(c) While holding metal clip up, pull back on
wheel speed sensor head removing it from hub and
bearing.
(5) Remove the 4 bolts attaching the hub and bear-
ing to the rear axle.
CAUTION: Corrosion may occur between the hub
and bearing, and the axle. If this occurs the hub
and bearing will be difficult to remove from the
axle. If the hub and bearing will not come out of the
axle by pulling on it by hand, do not pound on the
hub and bearing to remove it from the axle. Damage
will occur. Use the following procedure.(6) If hub and bearing cannot be removed from the
axle by hand, use Remover, Special Tool 8458 (Fig. 9)
and following procedure to press the hub and bearing
out of the axle.
(a) Thread Threaded Guide Pins into hub and
bearing mounting bolt holes.
(b) Remove the two outboard spring plate bolts.
(c) Using the spring plate bolts, install the
Screw Mount, Special Tool 8458±2, as shown (Fig.
9).
(d) Place Push Plate, Special Tool 8458±1, on
ends of Threaded Guide Pins
(e) Place a dab of grease in dimple of Push
Plate.
(f) Tighten the Forcing Screw, Special Tool
8458±3, up against dimple in Push Plate and press
hub and bearing out of axle by continuing to
tighten screw.
(g) Remove the tool.
(h) Reinstall the two outboard spring plate bolts.
Tighten the bolts to 102 N´m (75 ft. lbs.) torque.
(7) Remove the hub/bearing from the rear axle and
brake support plate.
ALL-WHEEL-DRIVE VEHICLES
(1) Set the parking brake.The parking brake is
set to keep the hub and bearing, and axle shaft
from rotating when loosening the hub nut.
Fig. 8 SENSOR CONNECTOR AT HUB AND
BEARING
1 - SECONDARY SENSOR RETAINING CLIP
2 - METAL SENSOR RETAINING CLIP
3 - HUB AND BEARING
Fig. 9 REMOVAL USING SPECIAL TOOL 8458
1 - THREADED GUIDE PINS 8458-4
2 - HUB AND BEARING
3 - LEAF SPRING PLATE
4 - FORCING SCREW 8458-3
5 - SCREW MOUNT 8458-2
6 - PUSH PLATE 8458-1
RSREAR2-31
HUB / BEARING (Continued)
Page 1548 of 4284

(2) Raise vehicle. See Hoisting in Lubrication And
Maintenance.
(3) Remove the wheel/tire assembly.
(4) Remove the cotter pin and nut retainer (Fig.
19) from the stub shaft of the outer C/V joint.
(5) Remove the spring washer (Fig. 18) from the
stub shaft of the outer C/V joint.
(6) Remove the hub nut and washer (Fig. 16) from
the stub shaft of the outer C/V joint.
(7) Remove the 6 bolts (Fig. 17) mounting the
driveshaft inner joint to the output shaft of the rear
drive line module.
(8) Remove the rear wheel speed sensor (Fig. 20)
from the rear hub/bearing.
(9) Release the parking brake.
(10) Remove the disc brake caliper to adapter
guide pin bolts (Fig. 15).
(11) Remove rear caliper from adapter using the
following procedure. First rotate rear of caliper up
from the adapter. Then pull the front of the caliper
and the outboard brake shoe anti-rattle clip out from
under the front abutment on the adapter (Fig. 14).
(12) Support caliper to prevent the weight of the
caliper from damaging the flexible brake hose (Fig.
10).
(13) Remove the rotor from the hub/bearing.
(14) Remove driveshaft from rear drive line mod-
ule and hub/bearing. Driveshaft is removed by first
compressing the inner joint on the driveshaft and
removing it from the drive line module. Then, slide
the outer joint of the driveshaft out of the hub/bear-
ing.(15) Remove the hub/bearing to axle mounting
bolts (Fig. 13).
CAUTION: Corrosion may occur between the hub/
bearing and the axle. If this occurs the hub/bearing
will be difficult to remove from the axle. If the hub/
bearing will not come out of the axle by pulling on
it by hand, do not pound on the hub/bearing to
remove it from the axle. Pounding on the hub/bear-
ing to remove it from the axle will damage the hub/
bearing. This damage will result in noise or failure
of the hub/bearing. To remove a hub/bearing which
is corroded to the axle, lightly tap the disc brake
caliper adapter using a soft faced hammer. This will
remove both the disc brake caliper adapter and
hub/bearing from the axle. The hub/bearing will
then need to be removed from the caliper adapter.
(16) Remove the hub/bearing from the axle. (Fig.
12).
(17) If the disc brake caliper adapter and hub/
bearing were removed as an assembly from the axle
and the hub/bearing cannot be removed from the
adapter by hand, use the following procedure to
remove it from the adapter. With a helper supporting
the caliper adapter in his hands, position Remover,
Special Tool 8214-1 on the cast housing of hub/bear-
ing (Fig. 11).Do not position special tool on
inner race of hub/bearing.Lightly strike Remover,
Special Tool 8214-1 with a hammer to remove the
hub/bearing from the caliper adapter.
Fig. 10 Correctly Supported Caliper
1 - WIRE
2 - CALIPER
3 - ADAPTER
4 - ROTOR
5 - INNER FENDER
Fig. 11 Hub/Bearing Removal From Caliper Adapter
1 - SPECIAL TOOL 8214-1
2 - PARK BRAKE CABLE
3 - DISC BRAKE CALIPER ADAPTER
4 - HUB/BEARING
2 - 32 REARRS
HUB / BEARING (Continued)
Page 1549 of 4284

INSTALLATION - HUB AND BEARING
FRONT-WHEEL-DRIVE VEHICLES
(1) Install the 4 hub and bearing to axle mounting
bolts into the holes in the flange of the rear axle.
(2) Install the rear brake support plate on the 4
mounting bolts installed in the flange of the rear
axle.
(3) Align the rear hub and bearing with the 4
mounting bolts and start mounting bolts into hub
and bearing. Tighten the 4 bolts in a crisscross pat-
tern until the hub nd bearing and brake support
plate is fully and squarely seated onto flange of rear
axle. Tighten the 4 mounting bolts to a torque of 129
N´m (95 ft. lbs.)
NOTE: If equipped with antilock brakes, make sure
wheel speed sensor stays clean and dry as it is
installed into the hub and bearing cap.
(4) If the vehicle is equipped with antilock brakes,
perform the following:
(a) If metal sensor retaining clip is not in the
neutral installed position on hub and bearing cap,
install from the bottom, if necessary, and push clip
upward until it snaps into position.
(b) Install wheel speed sensor head into rear of
hub and bearing aligning index tab with the notch
in the top of the mounting hole. Push the sensor in
until it snaps into place on the metal retaining
clip.
(c) Install secondary (yellow) retaining clip over
wheel speed sensor head and engage the tabs on
each side (Fig. 8).
(5) Install brake drum or disc brake rotor and
brake caliper. Refer to Brakes.
(6) Install wheel and tire. Tighten the wheel nuts
in the proper sequence to a torque of 135 N´m (100
ft. lbs.).
(7) Adjust the rear brakes as necessary. Refer to
Brakes.
(8) Lower vehicle.
(9) Road test vehicle to ensure proper operation of
brakes.
ALL-WHEEL-DRIVE VEHICLES
(1) Install hub/bearing on end of axle. (Fig. 12).
(2) Install the hub/bearing mounting bolts. In a
progressive crisscross pattern, tighten the 4 hub/
bearing mounting bolts (Fig. 13) until the disc brake
caliper adapter and hub/bearing are squarely seated
against the axle. Then tighten the hub/bearing
mounting bolts to a torque of 129 N´m (95 ft. lbs.).
(3) Install driveshaft in hub/bearing and on output
shaft of rear drive line module. Driveshaft is
installed by first sliding the outer joint of the drive-shaft into the hub/bearing and then compressing the
inner joint on the driveshaft and installing it on the
output shaft the drive line module.
(4) Install rotor on hub/bearing.
(5) Carefully lower disc brake caliper and brake
shoes over rotor and onto caliper adapter by revers-
ing the removal procedure (Fig. 14).
CAUTION: When installing guide pin bolts extreme
caution should be taken not to cross-thread the cal-
iper guide pin bolts.
Fig. 12 Hub/Bearing Removal And Installation
1 - PARK BRAKE BRAKE SHOE
2 - HUB/BEARING
3 - PARK BRAKE BRAKE SHOE
Fig. 13 Hub/Bearing Mounting Bolts
1 - HUB/BEARING
2 - AXLE
3 - MOUNTING BOLTS
4 - CALIPER ADAPTER
RSREAR2-33
HUB / BEARING (Continued)
Page 1550 of 4284

(6) Install the disc brake caliper guide pin bolts
(Fig. 15). Tighten the guide pin bolts to a torque of
22 N´m (192 in. lbs.).
(7) Clean all foreign material off the threads of the
outer C/V joint stub shaft. Install the washer and
hub nut (Fig. 16) on the stub shaft of the outer C/V
joint.
(8) Lower vehicle.(9) Set the park brake.This is required to keep
the driveshaft from rotating when tightening
and torquing the hub nut and driveshaft inner
joint to driveline module mounting nuts.
(10) Raise vehicle.
(11) Tighten the driveshaft inner joint to drive line
module output shaft mounting bolts (Fig. 17) to a
torque of 61 N´m (45 ft. lbs.).
(12) Tighten the outer C/V joint hub nut (Fig. 16)
to a torque of 244 N´m (180 ft. lbs.).
Fig. 14 Removing / Installing Caliper
1 - LIFT THIS END OF CALIPER AWAY FROM ADAPTER FIRST
2 - DISC BRAKE CALIPER
3 - ADAPTER ABUTMENT
4 - OUTBOARD BRAKE SHOE HOLD DOWN CLIP
5 - OUTBOARD BRAKE SHOE
6 - ROTOR
7 - ADAPTER
Fig. 15 Caliper Guide Pin Bolts
1 - STUD PIN BOLTS
2 - DISC BRAKE CALIPER
3 - DRIVESHAFT
4 - AXLE
5 - DISC BRAKE CALIPER ADAPTER
Fig. 16 Hub Nut And Washer
1 - CALIPER
2 - HUB NUT
3 - WASHER
4 - ROTOR
5 - ADAPTER
Fig. 17 Driveshaft Attachment To Driveline Module
1 - DRIVESHAFT
2 - BOLTS
3 - DRIVE LINE MODULE
4 - DRIVESHAFT INNER JOINT
2 - 34 REARRS
HUB / BEARING (Continued)
Page 1551 of 4284

(13) Install the spring washer (Fig. 18) on the stub
shaft of the outer C/V joint.
(14) Install the nut retainer and cotter pin (Fig.
19) on the stub shaft of the outer C/V joint.
(15) Install the wheel speed sensor on the hub/
bearing and adapter. Install the wheel speed sensor
attaching bolt (Fig. 20). Tighten the wheel speed sen-
sor attaching bolt to a torque of 12 N´m (105 in. lbs).
(16) Install wheel and tire.(17) Tighten the wheel mounting stud nuts in
proper sequence until all nuts are torqued to half
specification. Then repeat the tightening sequence to
the full specified torque of 135 N´m (100 ft. lbs.).
(18) Remove jackstands or lower hoist.
CAUTION: Before moving vehicle, pump the brake
pedal several times to insure the vehicle has a firm
brake pedal to adequately stop vehicle.
(19) Road test vehicle to ensure proper operation
of the brake system.
JOUNCE BUMPER
DESCRIPTION
There are two jounce bumpers used in the rear
suspension. One mounts to each frame rail above the
rear axle.
OPERATION
The jounce bumper limits suspension travel and
metal-to-metal contact of the rear axle with the
frame under full jounce conditions.
REMOVAL - AWD AND HEAVY DUTY
(1) Using slip-joint pliers grasp the base of the
jounce bumper. Turn the base counterclockwise (Fig.
21).
(2) Remove the jounce bumper from the frame rail.
REMOVAL - FRONT-WHEEL-DRIVE
(1) Remove the bolt attaching the jounce bumper
to frame rail (Fig. 22).
(2) Remove the jounce bumper from the frame rail.
Fig. 18 Spring Washer
1 - HUB NUT
2 - STUB SHAFT
3 - ROTOR
4 - SPRING WASHER
Fig. 19 Cotter Pin And Nut Retainer
1 - CALIPER
2 - COTTER PIN
3 - ROTOR
4 - NUT RETAINER
5 - OUTER C/V JOINT
Fig. 20 Wheel Speed Sensor
1 - MOUNTING BOLT
2 - WHEEL SPEED SENSOR
RSREAR2-35
HUB / BEARING (Continued)
Page 1552 of 4284

INSTALLATION - AWD AND HEAVY DUTY
(1) Install jounce bumper through bumper support
plate and thread into welded nut in frame rail.
(2) Tighten the jounce bumper to 33 N´m (290 in.
lbs.) torque.
INSTALLATION - FRONT-WHEEL-DRIVE
(1) Hook the forward end of the jounce bumper
bracket in the mounting hole of the frame rail, then
install the mounting bolt in the opposite end, secur-
ing the bumper to the frame rail. Tighten the jounce
bumper mounting bolt to 33 N´m (290 in. lbs.) torque.
SHOCK ABSORBER
DESCRIPTION
There is one shock absorber on each side of the
rear suspension. The top of each shock absorber is
bolted to the frame rail. The bottom of each shock
absorber is bolted to the rear axle.
This vehicle is available with either standard type
or load-leveling shock absorbers. On the exterior,
load-leveling shock absorbers are larger in diameter
than standard shock absorbers. The load-leveling
shock absorbers mount the same as the standard
shock absorbers.
OPERATION
The shock absorber dampens jounce and rebound
motions of the spring and suspension.
Each load-leveling shock absorber is a self-leveling,
self-contained vehicle leveling system and shock
absorber combined. It does not require an external
compressor, hoses, or height leveling sensors. All the
height leveling sensors, hydraulic pump, etc., are
contained inside the shock absorber. It uses road
inputs (bumps, stops, starts, turns, acceleration,
deceleration, etc.) to activate pumping, which results
in the extension and compression of the shock
absorber.
REMOVAL - SHOCK ABSORBER
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(2) Support the rear axle of the vehicle using 2
jackstands positioned at the outer ends of the axle.
NOTE: If the shock absorber lower mounting bolt
deflects upward during removal, raise axle by
adjusting the support jack. If the lower shock
absorber bolt deflects downward during removal,
lower the axle by adjusting the support jack.
(3) Remove the shock absorber lower mounting
bolt.
(4) While holding shock absorber, remove the
shock absorber upper mounting bolt and shock
absorber.
DISASSEMBLY - SHOCK ABSORBER (UPPER
BUSHING)
(1) Remove the shock absorber from the vehicle.
(2) Install the Receiver, Special Tool 8526-1, into
the cup of the Ball Joint Press, Special Tool C-4212F,
and tighten the set screw. Install the Driver, Special
Tool 8526-2, on the tip of the Ball Joint Press screw
drive as shown (Fig. 23).
Fig. 21 Jounce Bumper
1 - JOUNCE BUMPER
Fig. 22 Jounce Bumper - FWD
1-JOUNCE BUMPER
2 - 36 REARRS
JOUNCE BUMPER (Continued)