wheel torque DODGE TRUCK 1993 Service Owner's Manual

2
- 76
FRONT
SUSPENSION
AND
AXLE

MODEL
44 AXLE

MODEL
60 AXLE

FRONT
AXLE MODEL 44
FRONT
AXLE MODEL #0

DESCRIPTION
TORQUE

Bearing Cap
Bolts
95 to 122 N-m (70 to 90 ft. lbs.)
Brake/Spindle
Splash
Shield 34 to 41 N-m
(25 to 35 ft. lbs.)

Differential
Cover
Bolts
47 N-m (35 ft. lbs.)

Fill
Hole Plug 34 N-m (25 ft. lbs.)
Lower Ball Stud Nut 108 N-m (80 ft. lbs.)
Pinion Yoke Nut 271 to 298 N-m (200 to 220 ft. lbs.)
Shift Motor
Housing
Bolts 14 N-m (10 ft. lbs.) Spindle
Wheel
Bearing
Outer
Lock Nut...... 68 N-m (50 ft. lbs.)
Steering Knuckle Arm Nuts 122 N-m (90 ft. lbs.)

Ring
Gear
Bolts
61 to 81 N-m (45 to 60 ft. lbs.)
Upper Ball Stud Nut 136 N-m (100 ft. lbs.)
Upper Yoke Sleeve 54 N-m (40 ft. lbs.)
J9202-110
DESCRIPTION

TORQUE

Bearing Cap Bolts
Brake
Splash
Shield/Spindle.

Differential
Cover Bolts

Fill
Hole Plug
Lower King Pin Cap Screws...
Pinion Yoke Nut.
Spindle
Wheel
Bearing
Outer
Lock Nut

Ring
Gear
Bolts
(Grade 8)

Ring
Gear
Bolts
(Grade 9)
Upper King Pin Cap
Upper King Pin 95 to 122 N-m
(70 to 90 ft. lbs.)
68 to 81 N-m
(50 to 60 ft. lbs.)
47 N-m (35 ft. lbs.) 34 N-m (25 ft. lbs.) 95 to 122 N-m
(70 to 90 ft. lbs.) 339 to 366 N-m
(250 to 270 ft. lbs.)
.... 217 to 278 N-m (160 to 205 ft. lbs.)

136tol63N-m

(100 to 120 ft. lbs.)
..... 169 to 183 N-m (125 to 135 ft. lbs.)
96 to 122 N-m
(70 to 90 ft. lbs.)
668 to 813 N-m
(500 to 600 ft. lbs.)

J9202-111

•

REAR
SUSPENSION
AND
AXLE
3 - 1
CONTENTS

page

8
3/8 and 9 1/4
AXLE
11
GENERAL
INFORMATION
1
MODEL
60 and 70
AXLES
29

POWER-LOK DIFFERENTIAL
55

REAR
SUSPENSION—2WD
and
4WD VEHICLES
3
page

SERVICE
DIAGNOSIS
6

SPECIFICATIONS
27

SURE-GRIP
DIFFERENTIAL SERVICE
28

TORQUE SPECIFICATIONS
59

TRAC-LOK DIFFERENTIAL
51

GENERAL INFORMATION

SUSPENSION
Ram Truck rear suspensions
are
comprised
of;

• Drive axle
• Leaf springs
• Dual-action shock absorbers
• Jounce bumpers (used
to
limit
the
travel
of the
suspension) All
Ram
Truck
and
Ramcharger vehicles
are

equipped with leaf-type rear springs.
The
springs
have
a
one-piece, rubber bushing pressed into their main leaf front
eye.
Model
150 and
Ramcharger
ve­

hicles
are
equipped with
a
fixed-rate type leaf spring. Progressive-rate type rear leaf springs
are
standard equipment
for all
Model
250 and 350
vehicles.

AXLES
The
8 3/8, 9
1/4-Inch
,
Model
60 and 70
axle hous­
ings consist
of a
cast iron center section. They also
have
two
steel axle shaft tubes that
are
pressed into and welded
to the
differential housing. The removable, stamped steel cover provides
a

means
for
inspection
and
service without removing
the complete axle from
the
vehicle. Both axle types
are
equipped with
a
remote vent
fitting. A small, stamped metal axle gear ratio identifica­
tion
tag is
attached
to the
housing cover. The rear wheel anti-lock (RWAL) brake speed sen­
sor
is
attached
to the top,
forward exterior
of the dif­

ferential housing.
A
seal
is
located between
the
sensor
and the
wire harness connector.
The
seal
must
be
in-plaee when
the
wire connector
is
connected
to the
sensor.
The
RWAL brake exciter
ring
is
press-fitted onto
the
differential case against
the flange. A rear axle equipped with
a
Sure-Grip differential
is optionally available
for
both
Ram
Truck
and
Ram­
charger vehicles.
The
Sure-Grip
has a
two-piece case
that
is
interchangeable with
a
standard differential.
A limited-slip differential
is
optional
on
Model
60,

and
70
rear axles.
The
Model
60
uses
the
Trac-Lok
differential
and the
Model
70
uses
the
Power-Lok
dif­

ferential.
The
Trac-Lok differential uses
a
one-piece case while
the
Power-Lok differential uses
a two-

piece case. Both
use the
same internal components
as
a standard differential, plus
two
clutch disc packs.
IDENTIFICATION The axle differential covers
can be
used
for
identi­
fication (Fig.
1, 2, 3).
Model
60
axle
has the
assembly part number
and

gear ratio listed
on a tag. The tag is
attached
to the
left side
of the
housing cover
(Fig. 3).
Build date
identification codes
on
axles
are
stamped
on the
axle
shaft tube cover side.

LUBRICANTS
Multi-purpose, hypoid gear lubricant should
be

used
for
rear axles with either
a
standard
or a
Sure- Grip differential.
The
lubricant should have MIL-L-
2105-B
and by API GL 5
quality specifications.
MOPAR Hypoid Gear Lubricant conforms
to
both
of

these specifications.
In
addition,
4
ounces
of
Hypoid Additive must
be
included with
a
re-fill
for
Sure-Grip differentials.
If
the
rear axle
is
submerged
in
water,
the lu­

bricant must
be
replaced immediately. Avoid axle failure resulting from water contamination
of
the
lubricant.

REAR
SUSPENSION
AND
AXLE

3
- 6
REAR SUSPENSION
AND
AXLE

•

NUT PIPE
SOCKET
WRENCH
(DRIVER)

FLAT
THREADED
WASHER
ROD
J8917-20

Fig.
6
Spring
Eye
Bushing
Removal
(3) Align
the
bushing with
the
spring
eye and

tighten
the nut
located
at the
socket wrench
end of

the threaded
rod.
Tighten until
the
bushing
is
forced into
the
spring
eye.

The bushing must
be
centered
in the
spring

eye.
The
ends
of the
bushing must
be
flush
or
slightly recessed within
the end
surfaces
of the

spring
eye.
8ERW1GE DIAGNOSIS
INDEX
page

Driveline
Snap
8

Gear
and
Bearing Noise
7

General
Information
6
Limited
Slip
Differential
8
page
Low Speed Knock
.........................
8
Rear
Axle
Alignment
.......................
7

Tire
Noise
7
Vibration
8

GENERAL INFORMATION
Axle bearing problem conditions
are
usually caused
by: • Insufficient
or
incorrect lubricant
• Foreign matter/water contamination
• Incorrect bearing preload torque adjustment When serviced,
the
bearings must
be
cleaned thor­
oughly. They should
be
dried with lint-free shop tow­

els.
Never
dry
bearings with compressed
air.

This will overheat them
and
brinell
the
bearing surfaces. This will result
in
noisy operation after
repair. Axle gear problem conditions
are
usually
the
result

of:

• Insufficient lubrication
• Incorrect
or
contaminated lubricant
• Overloading (excessive engine torque)
• Incorrect clearance
or
backlash adjustment Insufficient lubrication
is
usually
the
result
of a

housing cover leak.
It can
also
be
from worn axle shaft
or
pinion gear seals. Check
for
cracks
or
porous
areas
in the
housing
or
tubes.
Using
the
wrong lubricant will cause overheating
and gear failure. Gear tooth cracking
and
bearing
spalling
are
indicators
of
this.
Axle component breakage
is
most often
the
result

of:

• Severe overloading
• Insufficient lubricant
• Incorrect lubricant • Improperly tightened components
Common causes
of
overloading
is
from full-throttle
acceleration. Overloading occurs when towing
heavier than normal loads. Component breakage
can
occur when
the
wheels
are
spun excessively. Insuffi­
cient
or
incorrect lubricants contribute
to
breakage
through overheating. Loose differential components can also cause breakage. Incorrect bearing preload
or
gear backlash will
not

result
in
component breakage. Mis-adjustment will
produce enough noise
to
cause service repair before
a

3
- 8
REAR SUSPENSION
AND
AXLE

• level. Where axle bearing damage is slight, the noise
is usually not noticeable at speeds above 30 mph.

LOW SPEED KNOCK
Low speed knock is generally caused by a worn
U-joint or by worn side-gear thrust washers. A worn
pinion gear shaft bore will also cause low speed knock.

VIBRATION
Vibration at the rear of the vehicle is usually
caused by a:
• Damaged drive shaft
• Missing drive shaft balance weight
• Worn, out-of-balance wheel and tires
• Loose wheel lug nuts
• Worn U-joint • Loose spring U-bolts
• Loose/broken rear springs or shackles
• Damaged axle shaft bearings
• Loose pinion gear nut
• Excessive pinion yoke run out
• Bent axle shaft Check for loose or damaged front-end components
or engine/transmission mounts. These components
can contribute to what appears to be a rear-end vi­
bration. Do not overlook engine accessories, brackets and drive belts. All driveline components should be examined be­
fore starting any repair. Refer to Group 22, Wheels and Tires for additional
information.

DRIVELINE SNAP
A snap or clunk noise when the vehicle is shifted
into gear (or the clutch engaged), can be caused by: • High engine idle speed
• Loose engine/transmission/transfer case mounts

9
Worn U-joints
• Loose spring shackles or U-bolts
• Loose pinion gear nut and yoke
• Excessive ring gear backlash
• Excessive differential side gear-to-case clearance A worn bushing in the transmission extension
housing can also cause noise. The source of a snap or a clunk noise can be deter­
mined with the assistance of a helper. Raise the ve­
hicle on a hoist with the wheels free to rotate. Instruct the helper to shift the transmission into gear. Listen for the noise, a mechanics stethoscope is
helpful in isolating the source of a noise.

LIMITED
SLIP DIFFERENTIAL
Under normal traction conditions, engine torque is
divided evenly. With low-traction surfaces, engine
torque is transferred to the wheel with the most tire
traction. When diagnosing a limited-slip differential
problem condition, the wheel with the least traction can continue spinning. The most common problem is a chatter noise when
turning corners. Check for incorrect or contaminated lubricant. Replace the gear lubricant if necessary.
• With Sure-Grip differentials add a container of
MOPAR® Hypoid Gear Additive This will correct the condition in most instances. If
the chatter persists, clutch damage could have oc­ curred. After changing the lubricant, drive the vehicle and
make 10 to 12 slow, figure-eight turns. This maneu­
ver will pump lubricant through the clutches.

REAR
SUSPENSION
AND
AXLE
3 - 9
SERVICE DIAGNOSIS
Condition
Possible
Cause
Correction

WHEEL
NOISE

AXLE
SHAFT
NOISE

AXLE
SHAFT
BROKE

DIFFERENTIAL
CASE

CRACKED

DIFFERENTIAL
GEARS

SCORED

LOSS
OF
LUBRICANT
(a) Wheel loose.
(b) Faulty, brinelled
wheel
bearing.
(a) Misaligned axle shaft tube.
(b) Bent or sprung axle shaft. (c) End play in drive pinion bearings.
(d) Excessive gear backlash
between
ring
gear
and pinion gear.
(e) Improper adjustment of drive pinion
gear
shaft bearings.
(f) Loose drive pinion gearshaft yoke nut.
(g) Improper
wheel
bearing adjustment. (h) Scuffed gear tooth contact surfaces.
(a) Misaligned axle shaft tube.
(b) Vehicle overloaded.
(c) Erratic clutch operation
(d) Grabbing clutch.
(a) Improper adjustment of
differential
bearings.

(b) Excessive ring gear backlash.
(c) Vehicle overloaded. (d) Erratic clutch operation.
(a) Insufficient lubrication.
(b) Improper grade of lubricant.
(c) Excessive spinning of one
wheel/tire.

(a) Lubricant
level
too high. (a) Tighten loose nuts.
(b) Faulty or brinelled bearings must be
replaced.
(a) Inspect axle shaft
tube
alignment. Correct as necessary.
(b) Replace bent or sprung axle shaft.
(c) Refer to Drive Pinion Bearing Pre-Load Adjustment.
(d) Check adjustment of ring gear
backlash
and pinion gear. Correct as
necessary.

(e) Adjust drive pinion shaft bearings.
(f) Tighten drive pinion gearshaft yoke nut
with
specified torque.
(g) Readjust as necessary.
(h) If necessary, replace scuffed gears.
(a) Replace broken axle shaft
after
correcting axle shaft
tube
alignment.
(b) Replace broken axle shaft. Avoid
excessive
weight on vehicle.
(c) Replace broken axle shaft
after
inspecting for other possible
causes.

Avoid
erratic
use of clutch.
(d) Replace broken axle shaft. Inspect clutch and make necessary repairs or adjustments.
(a) Replace cracked case; examine gears and bearings for possible damage. At
reassembly,
adjust

differential
bearings properly.
(b) Replace cracked case; examine gears and bearings for possible damage. At

reassembly,
adjust ring gear backlash properly.
(c) Replace cracked case; examine gears and bearings for possible damage.

Avoid
excessive weight on vehicle.
(d) Replace cracked case.
After
inspecting for other possible
causes,
examine
gears
and bearings for possible

damage.
Avoid
erratic
use of clutch.
(a) Replace scored gears. Scoring marks
on
the drive face of gear
teeth
or in
the bore are caused by instantaneous

fusing
of the mating surfaces. Scored
gears
should be replaced.
Fill
rear

differential
housing to
required
capacity

with
proper lubricant. Refer to
Specifications.

(b) Replace scored gears. Inspect all
gears
and bearings for possible

damage.
Clean and
refill
differential
housing
to
required
capacity
with

proper lubricant.
(c) Replace scored gears. Inspect all
gears,
pinion bores and shaft for

damage.
Service as necessary.
(a) Drain excess lubricant by removing
fill
plug and allow lubricant to
level
at lower edge of
fill
plug hole.

J9003-49

•

REAR
SUSPENSION
AND
AXLE
3 - 11 8 3/8 and 9 1/4
AXLE

INDEX

page
Axle Shaft, Seal
and
Bearing Service
......... 11
Complete Axle Removal/Installation
16

Differential
Service
16
Information
11

INFORMATION
The 8 3/8 and 9 1/4 axle (Fig. 1) housing consist of
a cast iron center section. They also have two steel
axle shaft tubes that are pressed into and welded to
the differential housing. The removable, stamped steel cover provides a
means for inspection and service without removing
the complete axle from the vehicle.

LUBRICANT
Multi-purpose, hypoid gear lubricant should be
used for 8 3/8 and 9 1/4 axles. The lubricant should
have MIL-L-2105C and API GL 5 quality specifica­

tions.
MOPAR® Hypoid Gear Lubricant conforms to
both of these specifications.
Refer to Group 0, Lubrication and Maintenance for
additional information.

CAUTION:
If a
rear axle
is
submerged
in
water,
the

axle lubricant must
be
replaced immediately.
DRAIN
AND
REFILL
(1) Drive the vehicle until the gear lubricant
reaches normal operating temperature.
(2) Raise and support the vehicle.
(3) Remove the lubricant fill hole plug from the
differential housing cover.
(4) Remove the differential housing cover. Allow
the original lubricant to completely drain from the
housing and axle shaft tubes. (5) With standard differential, clean the differen­
tial and the housing cavity with a flushing oil (or light engine oil). This will remove the residual lubri­
cant and foreign matter.Do not use water, steam,
kerosene or gasoline for flushing.

CAUTION:
DO NOT
FLUSH
Sure-Grip differentials.

Sure-Grip
differentials
may be
cleaned only
by
wip­
ing
with
clean,
lint-free
cloths.
(6)
Scrape the residual sealant from the housing
and cover mating surfaces. Clean the mating sur­
faces with mineral spirits. Apply a bead of MOPAR® Silicone Rubber Sealant on the housing cover (Fig.

2).
Allow the sealant to cure for a few minutes.
page

Lubricant
11
Pinion Depth Measurement
and
Adjustment
with
Gauge
Set 20

Pinion
Seal
Replacement
14
Install the housing cover within 5 minutes af­
ter applying the sealant. If not installed, the sealant must be removed and another bead ap­
plied. (7) Install the cover on the differential. Install the
identification tag. Tighten the cover bolts to 47 N#m (35 ft. lbs.) torque.

CAUTION:
Overfilling
the
differential
can
result
in

the lubricant foaming
and
overheating.

(8) Refill the differential with the specified quan­
tity of MOPAR® Hypoid Gear Lubricant. With Sure- Grip differentials, add a container of MOPAR®
Hypoid Gear Lubricant Additive.
(9) Install the fill hole plug.
(10) Road test the vehicle.

AXLE
SHAFT, SEAL AND BEARING
SERVICE
CAUTION:
When rear axle service
is
necessary, both rear wheels must
be
raised
off the
surface
so

that
they
are
free
to
rotate.
Be
cautious when
the

tires
are
being rotated
by the
engine
or by
other
means.

CAUTION:
If
equipped
with
a
Sure-Grip
differential,

do
not
rotate
either
axle shaft unless both
are
prop­

erly
in-place. Rotation
of one
axle shaft without
the
other being installed
can
result
in
misalignment
of

the side gears/splines. This
will
necessitate side
gear
re-alignment before
the
axle shaft
can be in­

stalled.
AXLE SHAFT REMOVAL
(1) Raise and support the vehicle.
(2) Remove the wheel.
(3) Remove the brake drum.
(4) Clean all the foreign material from housing
cover area.
(5) Loosen the housing cover bolts. Drain the lubri­
cant from the housing. Remove the housing cover.

(6)
Rotate the differential case so the pinion mate
gear shaft lock screw is accessible. Remove the lock screw and the pinion mate gear shaft from the case (Fig. 3).

3
- 14
REAR SUSPENSION
AND
AXLE
3
- 18
REAR SUSPENSION Fig.
6 Bearing
Removal
(9
1/4-Axle)

(4) Inspect the axle shaft tube bore for roughness
and burrs. Remove as necessary.

CAUTION:
Inspect
the
housing
bore for
burrs.
Re­
move
as
necessary.

BEARING
AND
SEAL
INSTALLATION
Always install a new seal. (1) Wipe the bore in the axle shaft tube clean.
(2) If the original bearing is not reusable, install a
new bearing.
• 8 3/8-Axle use Installer C-4198 with Handle
C-4171
• 9
1/4-Axle
use Installer C-4826 with Handle
C-4171

CAUTION:
DO NOT use the new axle
shaft
seal
to

position
or
seat
the bearing in the axle
shaft
bore.
(3) Insert the bearing into the tube. Ensure that
the bearing is not cocked and is seated firmly against
the tube shoulder.
(4) Install the new axle shaft seal (Fig. 7).
• 8 3/8-Axle use Installer C-4203 and Handle C-4171
• 9
1/4-Axle
use Installer C-4826 and Handle C-4171
SPECIAL
TOOL
SPECIAL
TOOL

Fig.
7 Axle Shaft
Seal
Installation
(5) When the tool cont

(face),
the seal will be a
depth.
AXLE SHAFT INSTALL* (1) Lubricate the bearin
the axle shaft and engage gear. Use care to prevei damaging the axle shaft
(2) Insert the C-clip loi
(Fig. 4). Push the axle s
C-clip lock.
(3) Insert the pinion ge
Install through the thrust
Align the hole in the shaf
Install the lock screw wit
Tighten the screw to 11 Is
3).

(4) Clean the cover anc
Refer to the Drain and Re
(5) Install the brake drv
(6) Install the wheel an
Tire Installation within th
cle.

(7) Raise or lower the
level.
(8) Remove the fill hole
housing with lubricant. I chart for the type and th
hole plug.
(9) Lower the vehicle. T
correct operation.

PINION
SEAL REPLACE!!

CAUTION:
The following

so
the correct pinion bea

tained.
If not completely f
failure
of the rear axle.
REMOVAL (1) Raise and support tr
(2) Mark the U-joint, pi]
for reference.
(3) Disconnect the drh
yoke. Secure the drive sha
prevent damage to the re*
(4) Remove the rear w
drums to prevent any dr
false bearing preload torq
(5) Use a Newton-mete
wrench to measure the p
tate the pinion shaft sev( wrench. Note the indicate moved through several re' (13) Install the brake drums.
(14) Install the wheels. Lower
(15) Adjust hoist so vehicle k
Check the differential housing h
essary, add sufficient amount.

COMPLETE AXLE REMOVAL/IN!
It is not necessary to remov
from the vehicle for routine or d
the differential housing or axle aged, the complete axle can 1
stalled.
REMOVAL (1) Raise the vehicle to a <
height that will permit support t at the front of the rear springs. (2) Block the brake pedal in tl
position with a wooden block. (3) Remove the rear wheels. '.
brake drum retaining clips oi
(4) Disconnect the brake flui
the wheel cylinders. Cap the fit of brake fluid.
(5) Remove the vent hose froi

pie.

(6) Remove the brake tee be
the brake fluid tubes from the c (7) Disconnect the parking bn
U-joint, pinion yoke, and pinion
Mark the U-joint, pinion yol
for reference. (8) Disconnect the drive she
yoke. Secure the drive shaft in a prevent damage to the rear U-jc
(9) Remove the shock absorl
nuts and bolts. Remove the reai
the U-bolts and the spring brad
(10) Remove the complete axL
(11) Wash and clean the outei
ing and tubes. Use an appropri; and dry the surface with comprc

INSTALLATION
(1) Position the rear axle sj
spring center bolts.
(2) Install the spring U-bolts
absorber lower bolts. Tighten tl
fled torque.
(3) Connect the parking brake
(4) Connect the brake fluid
wheel cylinders. Bleed and adjui (5) Align the installation refer
the drive shaft yoke to the pinii U-joint clamp bolts to 19-23 N
torque.
(6) Install the rear wheels. Ti|
correct tightening sequence.

3
- 28
REAR
SUSPENSION
AND
AXLE

•
SURE-GRIP
DIFFERENTIAL
SERVICE

GENERAL
INFORMATION
The Sure-Grip differential
is an
option available
in

the
8 1/4 and 9 1/4
inch rear axles
(Fig. 1).
EXCITER
RING RING

GEAR
DIFFERENTIAL

CASE

BEARING BEARING

J9003-119
Fig.
1
Sure-Grip
Differential

With
the
exception
of the
Sure-Grip differential

case,
all the
axle components
are
identical
to the

standard axle.
The
Sure-Grip
has a
two-piece differ­
ential case.
The
case
is
completely interchangeable
with
a
standard differential case
(Fig. 2).
Sure-Grip differential removal
and
installation
is
same
as
stan­
dard differential.
DIFFERENTIAL

CASE

PINION
GEAR

COIL SPRING LUBRICATION
WELL
SIDE
GEAR

CLUTCH

LUBRICATION
GROOVES

J9003-120

Fig.
2
Sure-Grip
Differential
Components
The action
of a
standard differential will allow
the

rear wheels
to
rotate
at
different speeds when
the ve­

hicle
is
turning. This differential will divide
the en­
gine torque equally between them. This
is a
desirable
and
normal function
of a
differential.
A

Sure-Grip differential transfers additional engine
torque
to the
rear wheel that
has the
better traction surface.
The
Sure-Grip differential allows
the
driving
wheel with better traction
to
develop more driving
torque than
the
other wheel.
The
Sure-Grip
is not a
locking type differential.
IDENTIFICATION Raise both rear wheels
off the
surface
and
rotate
them.
If
both rear wheels rotate
in the
same direc­
tion,
the
vehicle
is
equipped with
a
Sure-Grip differ­ ential. Another method
of
identification
is by

removing
the
housing cover fill hole plug. Examine (with
a
flashlight)
the
differential case components
through
the
lubricant fill hole.
SERVICE INFORMATION When Sure-Grip differential service
is
necessary,
both rear wheels must
be
raised
off the
surface
so
they
are
free
to
rotate.
A Sure-Grip differential case
is not
repairable.
If defective,
it
must
be
replaced
as a
complete
unit only.
Do not
attempt
to
disassemble
and re­

pair
the
case components.
Follow
the
same procedure outlined under Stan­
dard Differential
for
Removal
and
Installation.
DIFFERENTIAL TEST

CAUTION:
Whenever
a
rear axle
is
being
serviced,
RAISE
BOTH
REAR
WHEELS
off the
surface.
A Sure-Grip differential
can be
tested without
re­

moving
the
differential case from
the
housing.
(1) Position
the
vehicle
on a
hoist with
the
ignition

OFF.
Put the
transmission selector lever
in
PARK
(automatic transmission)
or in
first gear (manual
transmission).
(2) Attempt
to
manually rotate each rear wheel.
(3)
If
difficult
to
manually rotate either wheel,
the

Sure-Grip differential
is
functioning normally.
If

easy,
the
differential
is not
functioning normally
and
should
be
replaced.
A Sure-Grip differential case
is not
repairable.
If defective,
it
must
be
replaced
as a
complete
unit only.
Do not
attempt
to
disassemble
and re­

pair
the
case components.
DIFFERENTIAL NOISE Noise complaints involving
a
Sure-Grip should
be

evaluated
to
determine
the
source
of the
noise.
If a

noise occurs while
the
vehicle
is
turning,
the
proba­
ble cause
is
incorrect
or
insufficient gear lubricant. The drain
and
clean procedure should
be
used
for

possible elimination
of the
noise before replacing
the
differential.

3
- 32
REAR
SUSPENSION
AND
AXLE

•
PINION SEAL

J9203-55

Fig.
4
Pinion
Seal
Removal

SPECIAL
TOOL
C-4735

J9203-56

Fig.
5
Pinion
Seal
Installation
sition the yoke on the pinion gear.
(3) Install the pinion yoke, washer, and nut on
shaft. Tighten the nut to 339-366 N-m (250-270 ft.
lbs.) torque (Fig. 6).
(4) Align the installation reference marks and at­
tach the drive shaft to the yoke.
(5) Add API grade GL 5 hypoid gear lubricant to
the differential housing, if necessary. (6) Lower the vehicle.
DIFFERENTIAL

Fig.
6 Tightening
Pinion
Shaft Nut
AXLE
SHAFT
REiOWAL/INSTALLATlON

CAUTION:
RAISE
BOTH
REAR
WHEELS
off the
sur­

face whenever a rear axle is being
serviced.

REMOVAL-MODEL 60 (1) Remove the axle shaft flange bolts.
(2) Slide the axle shaft out from the axle tube (Fig.

1).

INSTALLATION-MODEL 60 (1) Clean the gasket contact surface area on the
flange with an appropriate solvent. Install a new flange gasket and slide the axle shaft into the tube (Fig. 1). (2) Install the bolts and tighten to 95 N»m (70 ft.
lbs.) torque.
REMOVAL-MODEL 70 (1) Remove the axle shaft flange lock nuts. (2) Strike the axle shaft sharply in the center of
the flange with a hammer to the loosen the tapered dowels. Slide the axle shaft out from the axle tube (Fig. 1).
INSTALLATION-MODEL 70 (1) Clean the gasket contact surface area on the
flange with an appropriate solvent. Install a new
flange gasket and slide the axle shaft into the tube
(Fig. 1). (2) Install the tapered dowels and the lock nuts.
Tighten the lock nuts to 95 N*m (70 ft. lbs.) torque.

•

REAR
SUSPENSION
AND
AXLE
3 - 33
WHEEL BEARING SERVICE

REMOVAL (1) Remove the axle shaft, refer to the removal
procedure. (2) Remove the nut lock and adjustment nut.
(3) Remove the hub and drum assembly. The outer
wheel bearing will slide out as the hub is being re­
moved. (4) Place hub on bench and remove inner grease
seal. Discard seal. (5) Remove inner wheel bearing. Inspect wheel
bearings for wear. Replace as necessary.
CLEANING AND INSPECTION (1) Thoroughly clean both wheel bearings and in­
terior of the hub. Remove all of the residual lubri­ cant. (2) To clean the bearings:
• Soak them in an appropriate cleaning solvent
• Strike the flat of each bearing against a hardwood
block several times • Flush bearing between strikes
• Repeat the procedure above until each bearing is clean
• Dry the bearings with compressed air but do not
spin them (3) After cleaning, apply engine oil to each bear­
ing. (4) Rotate each bearing slowly while applying
downward force. Examine the rollers for pitting and
roughness. Replace worn or otherwise defective bear­
ings.
If a bearing has pitted and/or rough surfaced
rollers, replace both the bearing and bearing cup. (5) If reusable, remove the engine oil from each
bearing. Pack each bearing with multi-purpose
NLGI, grade 2, EP-type lubricant. Ensure that lubricant is forced into all the cav­
ities between the bearing cage and rollers.
INSTALLATION (1) If a bearing and cup must be replaced, remove
the cup from the hub bore. Use a brass drift or an appropriate removal tool to tap out the cup. (2) Install the replacement bearing cup(s) with an
appropriate installation tool.
(3) Apply lubricant to surface area of the hub bore.
Install the inner wheel bearing in the hub. Install a
replacement bearing seal with an appropriate seal installation tool. (4) Inspect the bearing and seal contact surfaces on
the axle for burrs and/or roughness.
(5) Remove all the rough contact surfaces from the

axle.
Apply a coating of multi-purpose NLGI, grade

2,
EP-type lubricant to the axle.

CAUTION:
Use care to prevent the inner
wheel
bear­
ing
and bearing
seal
from contacting the axle
threads
during installation. Otherwise, the
threads,

bearing,
and
seal
could
be
damaged.

(6) Carefully slide the hub onto the axle. Install
the outer wheel bearing, the locktab and outer wheel
bearing locknut.
(7) Tighten the adjustment nut to 163-190 Nnn
(120-140 ft. lbs.) torque while rotating the wheel. (8) Loosen the adjustment nut 1/3 of-a-turn (120
degrees) to provide 0.001-inch to 0.008-inch wheel
bearing end play.
(9) Tap the nut lock into the spindle keyway and
adjustment nut.
(10) Install the axle shaft, refer to the installation
procedure.

COMPLETE AXLE REMOVAL/INSTALLATION
REMOVAL It is not necessary to remove the complete axle
from the vehicle for routine or differential service. If
the differential housing or axle shaft tubes are dam­ aged, the complete axle can be removed and in­
stalled.
(1) Raise the rear of the vehicle until the rear
wheels are not contacting the surface. Support the
vehicle body at the front of the rear springs.
(2) Use a wooden block to retain the brake pedal
in the up position.
(3) Remove the axle shafts, wheels, hubs and
brake drums. If necessary, refer to the applicable re­ moval procedures.
(4) Disconnect the brake line and cap the fittings
to prevent loss of brake fluid. (5) Disconnect the parking brake cables.
Scribe installation alignment reference marks
on drive shaft U-joint and on pinion yoke. (6) Disconnect the drive shaft U-joint from the pin­
ion yoke. Secure it in an upright position to prevent
damage to the U-joint.
(7) Remove the rear shock absorbers and the rear
spring U-bolts from the axle. (8) Remove the rear axle from the vehicle.
INSTALLATION (1) If the differential housing cover was removed,
ensure differential housing and cover mating sur­
faces are clean.
(2) If cover was removed, apply a bead of MOPAR
Silicone Rubber Sealant around the cover bolt circle.
Install the differential housing cover. Tighten the
cover bolts to 47 N»m (35 ft. lbs.) torque. Install the axle gear ratio identification tag under one of
the cover bolts.
(3) With the vehicle body supported at the front of
the rear springs, position the axle under the rear springs.