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i n g ( w i t h a
flashlight)
t h e differential case compo-
nents v i a t h e fill hole p l u g hole.
SERVICE
INFORMATION
The service procedures for a S u r e - G r i p differential
are essentially t h e same as those used for a standard
differential,
therefore,
only
information/procedures
i n v o l v i n g t h e differences t h a t exist between t h e t w o
differential types w i l l be provided i n t h i s section.
CAUTION: Whenever a rear axle is being serviced
or anytime it is to be rotated via the engine (or by
another means), RAISE BOTH REAR WHEELS off
the surface.
DIFFERENTIAL
TEST
A Sure-Grip differential can be tested t o deter-
m i n e i f i t is functioning n o r m a l l y w i t h o u t r e m o v i n g
the differential case from t h e housing.
(1) Position t h e vehicle on a hoist w i t h t h e i g n i t i o n
O F F and t h e transmission selector lever i n " P A R K "
(automatic transmission) or i n first gear ( m a n u a l
transmission).
(2) A t t e m p t to m a n u a l l y rotate each rear wheel b y
g r i p p i n g t h e t i r e tread area a n d a p p l y i n g a r o t a t i n g
force w i t h your hands.
(3) I f i t is extremely
difficult (or impossible) t o
m a n u a l l y rotate
either
wheel,
consider
t h a t t h e
Sure-Grip differential is functioning n o r m a l l y . I f i t
is relatively easy t o m a n u a l l y rotate either
wheel
continuously, t h e differential is n o t f u n c t i o n i n g nor-
m a l l y and should be replaced.
A
Sure-Grip differential case is n o t repairable
and, i f defective, must be replaced as a complete u n i t
only. Do n o t attempt t o disassemble a n d repair/
replace the differential case components.
DIFFERENTIAL
NOISE
Noise complaints i n v o l v i n g rear axles
equipped
w i t h a Sure-Grip differential should be evaluated t o
determine t h e source of t h e noise. I f , d u r i n g a test
ride, a s i m i l a r noise occurs w h i l e t h e vehicle is
" t u r n i n g " b u t n o t d u r i n g straight-ahead m o t i o n , t h e
probable cause is incorrect or insufficient gear l u b r i -
cant. The following d r a i n and clean procedure should
be used for possible e l i m i n a t i o n o f t h e noise before
replacing the differential.
WARNING: WHEN SERVICING VEHICLES WITH AN
AXLE EQUIPPED WITH A SURE-GRIP DIFFEREN-
TIAL, DO NOT USE THE ENGINE TO ROTATE THE
AXLE AND WHEELS UNLESS BOTH REAR WHEELS
ARE RAISED FROM THE SURFACE AND THE VEHI-
C L E
SUPPORTED.
A SURE-GRIP
DIFFERENTIAL
EQUIPPED AXLE CAN EXERT ENOUGH DRIVING
FORCE (IF ONE WHEEL IS IN CONTACT WITH THE
SURFACE) TO CAUSE THE VEHICLE TO MOVE.
(1) W i t h t h e rear axle l u b r i c a n t a t n o r m a l operat-
i n g temperature, raise a n d support t h e vehicle (rear
wheels free t o rotate).
(2) Remove t h e differential housing cover and d r a i n
(and discard) t h e l u b r i c a n t . Rotate t h e differential
u n t i l t h e opening i n t h e differential case is facing
downward. Wipe a n d remove t h e l u b r i c a n t from a l l
accessible surface areas i n t h e differential housing.
T h e p u r p o s e o f d r a i n i n g a n d d i s c a r d i n g t h e l u -
b r i c a n t i s t o e l i m i n a t e a n y s o l i d p a r t i c l e s o r l i q -
u i d
c o n t a m i n a n t s
t h a t
c o u l d
b e c a u s i n g t h e
n o i s e .
(3) Scrape t h e residual gasket and/or sealant from
the housing a n d cover m a t i n g surfaces, thoroughly
clean t h e m a t i n g surfaces w i t h m i n e r a l spirits (or a n
equivalent product) a n d d r y t h e surfaces
completely.
A p p l y a 1/16-inch t o 3/32-inch (1.6-mm t o 2.4-mm)
t h i c k "bead" of M O P A R Silicone Rubber Sealant (or
an equivalent sealant) around t h e bolt circle on t h e
housing
cover ( F i g . 49). A l l o w
t h e s e a l a n t t o
" c u r e " f o r a f e w m i n u t e s .
SEALANT
1/16-TO
3/32-INCH
(1.59-TO
.38-AAAA)
THICK BEAD
DIFFERENTIAL
HOUSING
COVER
(TYPICAL)
J9003-85
Fig. 49 Sealant On Housing Cover
I f f o r a n y r e a s o n t h e h o u s i n g c o v e r i s n o t i n -
s t a l l e d w i t h i n 20 m i n u t e s a f t e r a p p l y i n g t h e seal-
a n t , t h e s e a l a n t m u s t b e r e m o v e d a n d a n o t h e r
" b e a d " o f s e a l a n t a p p l i e d .
(4) I n s t a l l t h e housing cover on t h e differential
housing w i t h t h e attaching bolts. I n s t a l l t h e axle
gear r a t i o identification t a g w i t h one of t h e cover
bolts. T i g h t e n t h e cover bolts w i t h 47 N-m (35 ft-lbs)
torque.
(5) Remove t h e supports. Raise or lower t h e hoist
u n t i l t h e vehicle is level a n d t h e n support t h e vehi-
cle.
(6) Remove t h e f i l l hole p l u g from the differential
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