Page 73 of 1938

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) Using 2 jack stands positioned under the outer
ends of the axle, raise the axle enough to remove the
weight of the axle from the rear springs.
(5) Loosen and remove the axle plate bolts from
the rear axle (Fig. 6).
(6) Remove the axle plate from the rear axle and
the leaf spring (Fig. 7).
(7) Using the jack standsslowlylower the rear
axle, permitting the rear springs to hang free.
(8) Loosen and remove the 4 bolts (Fig. 8) from the
front mount of the leaf spring.
(9) Loosen and remove the nuts from the spring
hanger (Fig. 9) for the rear leaf spring. Then remove
the hanger plate from the hanger and remove the
spring from the spring hanger (Fig. 9).
Fig. 5 Rear Shock Mounting Bolt
Fig. 6 Axle Plate Bolts
Fig. 7 Axle Plate
Fig. 8 Leaf Spring Front Mount
Fig. 9 Rear Spring Hanger
NSSUSPENSION 2 - 41
REMOVAL AND INSTALLATION (Continued)
Page 74 of 1938

(10) Remove the leaf spring from the vehicle (Fig.
10).
(11) Loosen and remove the pivot bolt from the
front mount of the rear leaf spring. (Fig. 11).
FRONT BUSHING REPLACEMENT
(1) Install leaf spring in a proper holding fixture.
(2) Install leaf spring press Special Tool C-4212±F.
(3) Install adapter Special Tool C-4212±3.
(4) Tighten leaf spring press until bushing is
extracted from leaf spring.
(5) Remove leaf spring press from leaf spring.
(6) Insert replacement bushing into the leaf spring
eye.Verify that the bushing flange is on the left
side of the leaf spring when leaf spring is in the
in vehicle installed position.
(7) Install leaf spring press Special Tool C-4212±F.
(8) Install adapter Special Tool C-4212±4.
(9) Tighten leaf spring press until bushing flange
bottoms solidly against leaf spring eye.
(10) Remove leaf spring press and adapter.(11) Bend the bushing tabs so that they are con-
tacting the leaf spring.
INSTALLATION
(1) Assemble front spring mount to front of spring
eye and install pivot bolt and nut. Do not tighten.
CAUTION: Pivot bolt must face inboard to prevent
structural damage during installation of spring.
(2) Raise front of spring and install four hanger
bolts, tighten to 61 N´m (45 ft. lbs.) torque.
(3) Install rear of spring onto rear spring shackle.
Install shackle plate. Do not tighten.
(4) Verify lower leaf spring isolator is in position.
(5) Raise axle into correct position on leaf spring
with axle centered under spring locator post (Fig.
12).
(6) Verify that the leaf spring isolator is correctly
positioned in the axle plate.
(7) Install axle plate on the spring.
(8) Install axle plate bolts. Tighten bolts to 108
N´m (80 ft. lbs.) torque.
(9) Install shock absorber bolts. Do not tighten.
(10) Lower vehicle to floor so that the full weight
of vehicle is supported by the tires.
(11) Tighten component fasteners as follows:
²Front pivot boltÐ156 N´m (115 ft. lbs.)
²Shackle nutsÐ61 N´m (45 ft. lbs.)
²Shock absorber boltsÐ101 N´m (75 ft. lbs.)
(12) If the vehicle is not equipped with antilock
brakes, raise vehicle and the connect the actuator for
the height sensing proportioning valve on the rear
leaf spring. Adjust the height sensing proportioning
valve. Refer to the Adjustment Section in this group
of the service manual for the required adjustment
procedure.
Fig. 10 Leaf Spring Remove/Install
Fig. 11 Leaf Spring Front Mount
Fig. 12 Leaf Spring Locator Post
2 - 42 SUSPENSIONNS
REMOVAL AND INSTALLATION (Continued)
Page 75 of 1938

REAR SPRINGS (AWD)
REMOVE
(1) Raise vehicle on frame contact hoist to a com-
fortable working position.
(2) Remove the driveshaft from the side of the
vehicle that requires the removal of the leaf spring.
Refer to Group 3 Driveline in this service manual for
the procedure covering the removal of the rear drive-
shafts.
(3) Support axle with a jack stand. Pad should just
contact axle.
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) Begin removal of the shock absorber lower
mounting bolt (Fig. 13).
(5) Using 2 jack stands positioned under the outer
ends of the axle, raise the axle enough to remove the
weight of the axle from the rear springs.
(6) Loosen and remove the axle plate bolts from
the rear axle (Fig. 14).
(7) Using the jack standsslowlylower the rear
axle, permitting the rear springs to hang free.
(8) Loosen and remove the 4 bolts (Fig. 15) at the
front mount of the rear leaf spring.
(9) Loosen and remove the 2 bolts and the 2 nuts
from the spring hanger (Fig. 16) for the rear leaf
spring. Then remove the inner half of the spring
hanger from the outer half hanger of the spring
hanger and the spring. (Fig. 16).
(10) Remove the rear leaf spring from the outer
half of the spring hanger
Fig. 13 Rear Shock Absorber Mounting Bolt
Fig. 14 Axle Plate Bolts
Fig. 15 Leaf Spring Front Mount
Fig. 16 Rear Spring Hanger
NSSUSPENSION 2 - 43
REMOVAL AND INSTALLATION (Continued)
Page 76 of 1938

(11) Remove the leaf spring from the vehicle (Fig.
17).
(12) Loosen and remove the pivot bolt from the
front mount of the rear leaf spring. (Fig. 18).
FRONT BUSHING REPLACEMENT
(1) Install leaf spring in a proper holding fixture.
(2) Install leaf spring press Special Tool C-4212±F.
(3) Install adapter Special Tool C-4212±3.
(4) Tighten leaf spring press until bushing is
extracted from leaf spring.
(5) Remove leaf spring press from leaf spring.
(6) Insert replacement bushing into the leaf spring
eye. Verify that the bushing flange is on the outboard
side of the leaf spring.
(7) Install leaf spring press Special Tool C-4212±F.
(8) Install adapter Special Tool C-4212±4.
(9) Tighten leaf spring press until bushing flange
bottoms solidly against leaf spring eye.
(10) Remove leaf spring press and adapter.(11) Bend the tabs on the bushing until they are
contacting the leaf spring.
INSTALL
CAUTION: Pivot bolt must face inboard to prevent
structural damage during installation of spring.
(1) Install the front of the rear leaf spring into the
spring mount (Fig. 18). Install the pivot bolt and nut.
Do not tighten the pivot bolt at this time.
(2) Position the front spring mount for the rear
leaf spring against the floor pan of the vehicle.
Install the 4 mounting bolts for the spring mount.
Tighten the 4 mounting bolts to a torque of 61 N´m
(45 ft. lbs.).
(3) Install the rear of the leaf spring onto the outer
half of the rear hanger. Install the inner half of the
rear hanger. Install the nut and bolts on the rear
hangerbut do not tighten at this time.
(4) Raise axle assembly into correct position with
axle centered under spring locator post.
(5) Install axle plate bolts. Tighten bolts to 108
N´m (80 ft. lbs.) torque.
(6) Install shock absorber bolts. Do not tighten.
(7) Lower vehicle to floor and with full weight of
vehicle on wheels. Tighten component fasteners as
follows:
CAUTION: The following sequence must be fol-
lowed when tightening the pin nuts on the rear
hanger for the rear leaf spring. First the hanger pin
nuts must be tightened to the specified torque
shown below. Then tighten the retaining bolts for
the inner to outer half of the spring hanger to the
torque specification listed below. This sequence
must be followed to properly seat the bushings into
the springs and to avoid bending the spring hanger.
²Front pivot bolt-156 N´m (115 ft. lbs.)
²Rear spring hanger pin nuts-61 N´m (45 ft. lbs.)
²Rear spring hanger inner to outer half retaining
bolts-61 N´m (45 ft. lbs.)
²Shock absorber upper mounting bolt-115 N´m
(85 ft. lbs.)
²Shock absorber lower mounting bolt-108 N´m (80
ft. lbs.)
(8) If the vehicle is not equipped with antilock
brakes, raise vehicle and connect the actuator for the
height sensing proportioning valve on the rear leaf
spring. Adjust the height sensing proportioning
valve. Refer to the Adjustment Section in this group
of the service manual for the required adjustment
procedure.
Fig. 17 Leaf Spring Remove/Install
Fig. 18 Leaf Spring Front Mount
2 - 44 SUSPENSIONNS
REMOVAL AND INSTALLATION (Continued)
Page 77 of 1938

SHOCK ABSORBER
REMOVE/INSTALL
(1) Raise vehicle. Vehicle is to be raised and sup-
ported on jackstands or on a frame contact type
hoist. See Hoisting in the Lubrication And Mainte-
nance section of this service manual.
(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.
(5) To install the shock absorber use the reverse
sequence of its removal.
(6) Lower the vehicle to the ground so the full
weight of the vehicle is supported by the suspension.
(7) Tighten the upper and lower shock absorber
mounting bolt to their specified torques.
REAR TRACK BAR
REMOVE
(1) Remove the nut and bolt mounting the track
bar to the rear axle (Fig. 19).
(2) Remove the nut and bolt attaching the track
bar to the track bar mount on the body of the vehicle.
Remove the track bar from the track bar mount.
INSTALL
(1) Install the track bar first into the body mount
for the track bar (Fig. 20). Install the track bar boltwith the head of the bolt facing toward the rear of
the vehicle (Fig. 21). Do not tighten.
(2) Install the track bar into its mounting bracket
on the rear axle (Fig. 19). Install the track bar bolt
with the head of the bolt facing toward the rear of
the vehicle. Do not tighten.
(3) Lower the vehicle to the ground until the full
weight of the vehicle is supported by the wheels.
Tighten both track bar attaching bolts to a torque of
95 N´m (70 ft. lbs.).
TRACK BAR MOUNT
REMOVE
(1) Remove the track bar from the track bar
mount.
(2) Remove the three bolts attaching the track bar
mount to the body (Fig. 22).
Fig. 19 Track Bar Mounting To Axle
Fig. 20 Track Bar Installation
Fig. 21 Track Bar Bolt Installation
NSSUSPENSION 2 - 45
REMOVAL AND INSTALLATION (Continued)
Page 78 of 1938

INSTALLATION
(1) For installation, reverse removal procedure.
Tighten bolts to 61 N´m (45 ft. lbs.).
STABILIZER BAR
REMOVAL
(1) Raise vehicle. Vehicle is to be raised and sup-
ported on jack stands or on a frame contact type
hoist. See Hoisting in the Lubrication and Mainte-
nance section of this service manual.
(2) Remove the 2 lower bolts which hold the stabi-
lizer bar to the link arm on each side of the vehicle.
(3) Loosen but do not fully remove the four bolts
that attach the stabilizer bar bushing retainers to
the rear axle brackets.
(4) While holding the stabilizer bar in place. Fully
remove the 4 bolts loosened in step 3.
(5) Remove the stabilizer bar from the vehicle.
(6) If the link arms need to be serviced, remove
the upper link arm to bracket bolt. Then remove link
arm from frame rail attaching bracket.
INSPECTION
Inspect for broken or distorted clamps, retainers,
and bushings. If bushing replacement is required, the
stabilizer bar to axle bushings can be removed from
the stabilizer bar by opening the split.
INSTALLATION
(1) Install the link arms onto the frame rail brack-
ets. DO NOT TIGHTEN.
(2) Position the axle to stabilizer bar bushings on
the stabilizer bar with the slit in the bushings facing
up.(3) Lift the stabilizer bar onto the rear axle and
install the retainers and the four mounting bolts. DO
NOT TIGHTEN.
(4) Install the two lower link arm bolts on the sta-
bilizer bar. DO NOT TIGHTEN.
(5) Lower the vehicle so that the full weight of the
vehicle is on all four tires. With the vehicle at its
curb height, tighten all attaching bolts to the torques
listed below.
²Stabilizer bar bushing to axle bracket bolts 61
N´m (45 ft. lbs.)
²Link arm to frame rail bracket 61 N´m (45 ft.
lbs.)
²Stabilizer bar to link arm 61 N´m (45 ft. lbs.)
²Frame rail bracket to frame rail 61 N´m (45 ft.
lbs.)
JOUNCE BUMPER
There are two types of jounce bumpers available
depending on which suspension option the vehicle is
equipped with.
REMOVAL-STANDARD
The jounce bumper is serviced as an assembly. The
jounce bumper mounts to the frame rail at a weld
nut located on the frame rail (Fig. 23).
(1) Using the proper tool, remove the bolt attach-
ing the jounce bumper to frame rail.
(2) Remove the jounce bumper from the frame rail.
INSTALLATION-STANDARD
(1) For installation, reverse the removal procedure.
Tighten the jounce bumper mounting bolt to a torque
of 33 N´m (290 in. lbs.).
Fig. 22 Track Bar Mount
Fig. 23 Jounce Bumper-Standard
2 - 46 SUSPENSIONNS
REMOVAL AND INSTALLATION (Continued)
Page 79 of 1938

REMOVAL-HEAVY DUTY
The jounce bumpers are serviced as an assembly.
The jounce bumpers screw into a weld nut located in
the frame rail (Fig. 24).
(1) Using slip-joint pliers grasp the base of the
jounce bumper. Turn the base counterclockwise (Fig.
25).
(2) Remove the jounce bumper from the frame rail.
INSTALLATION-HEAVY DUTY
(1) For installation, reverse the removal procedure.
Tighten the jounce bumper to a torque of 33 N´m
(290 in. lbs.).
LEAF SPRING FRONT MOUNT
REMOVE
(1) Loosen the pivot bolt attaching the front of the
leaf spring to the spring mount (Fig. 26).
(2) Install a jackstand under the side of the axle
having the leaf spring mount removed. Using thejackstand support the weight of the axle and leaf
spring.
(3) Remove the lower mounting bolt from the
shock absorber.
(4) Remove the bolts attaching the leaf spring
front mount (Fig. 26) to the body of the vehicle.
(5) Lower the leaf spring and remove the front
mount from the spring.
INSTALLATION
(1) For installation, reverse removal procedure. Do
not tighten front through bolt fully until vehicle is
lowered and the full vehicle weight is applied to the
rear wheels. Tighten leaf spring front mount bolts to
61 N´m (45 ft. lbs.). Tighten leaf spring front through
bolt to 156 N´m (115 ft. lbs.).
LEAF SPRING REAR MOUNT
REMOVE
(1) Remove the attaching nuts and bolts from the
leaf spring rear shackle (Fig. 27) and (Fig. 28).
Fig. 24 Jounce Bumper-Heavy Duty
Fig. 25 Bumper Replacement
Fig. 26 Leaf Spring Front Mount
Fig. 27 Leaf Spring Shackle Nuts (FWD)
NSSUSPENSION 2 - 47
REMOVAL AND INSTALLATION (Continued)
Page 80 of 1938

(2) Install a jackstand under the side of the axle
having the leaf spring mount removed. Using the
jackstand, support the weight of the axle and leaf
spring.
(3) Remove the lower mounting bolt from the
shock absorber.
(4) Remove the bolts attaching the leaf spring rear
mount to the body of the vehicle (Fig. 29).
(5) Lower the jackstand and the rear of the leaf
spring. Remove the shackle from the leaf spring
bushing.
INSTALL
CAUTION: The following sequence must be fol-
lowed when tightening the pin nuts on the rearhanger for the rear leaf spring. First the hanger pin
nuts must be tightened to the specified torque.
Then tighten the retaining bolts for the inner to
outer half of the spring hanger to the specified
torque. This sequence must be followed to avoid
bending the spring hanger.
(1) For installation, reverse removal procedure. Do
not tighten rear spring shackle nuts fully until vehi-
cle is lowered and the full vehicle weight is applied
to the rear wheels. Tighten rear spring mount bolts
to 61 N´m (45 ft. lbs.). Tighten shackle nuts to 61
N´m (45 ft. lbs.).
SPECIFICATIONS
REAR SUSPENSION FASTENER TORQUES
DESCRIPTION TORQUE
SHOCK ABSORBER MOUNTING BOLTS:
Standard Shock Absorber......101 N´m (75 ft. lbs.)
Self Load Leveling Shock
Absorber.................101 N´m (75 ft. lbs.)
JOUNCE BUMPER:
To Frame Rail..............33N´m(290 in. lbs.)
TRACK BAR:
To Axle And Mounting
Bracket Pivot Bolt..........95N´m(70ft.lbs.)
Bracket To Body Attaching......61N´m(45ft.lbs.)
LEAF SPRING:
Spring Plate To Axle
Attaching Bolts............108 N´m (80 ft. lbs.)
Rear Mount To Body Bolts......61N´m(45ft.lbs.)
Front Mount To Body Bolts......61N´m(45ft.lbs.)
To Front Hanger
Mounting Nut............156 N´m (115 ft. lbs.)
Shackle Plate Nuts............61N´m(45ft.lbs.)
STABILIZER BAR:
Bushing Retainer To Axle
Attaching Bolts.............61N´m(45ft.lbs.)
Attaching Link Nuts...........61N´m(45ft.lbs.)
Frame Rail Bracket
Mounting Bolts.............61N´m(45ft.lbs.)
Link Arm To Frame
Rail Bracket...............61N´m(45ft.lbs.)
HUB AND BEARING:
To Axle Mounting Bolts........129 N´m (95 ft. lbs.)
Stub Axle Nut..............224 N´m (180 ft. lbs.)
Wheel Mounting
LugNut...........110-135 N´m (85-115 ft. lbs.)
Fig. 28 Leaf Spring Shackle Nuts/Bolts (AWD)
Fig. 29 Rear Spring Mount
2 - 48 SUSPENSIONNS
REMOVAL AND INSTALLATION (Continued)