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(22) I n s t a l l the drive p i n i o n gear shaft (axle) yoke,
washer, and a replacement n u t on the shaft. T i g h t e n
t h e n u t w i t h 339 to 366 N-m (250 to 270
ft-lbs)
torque.
(23) Use a Newton-meter or a n i n c h pound torque
wrench (Fig. 29) to rotate t h e d r i v e p i n i o n gear shaft
and observe the indicated b e a r i n g "preload" torque.
The torque necessary to rotate t h e drive p i n i o n gear
shaft should be between 2.26 to 4.53 N-m (20 to 40
in-lbs).
I f t h e d r i v e p i n i o n g e a r s h a f t b e a r i n g
" p r e -
l o a d " t o r q u e i s n o t w i t h i n t h e s p e c i f i e d
t o l e r -
ance, c o r r e c t t h e s h i m t h i c k n e s s a c c o r d i n g l y . T o
i n c r e a s e t h e " p r e l o a d " t o r q u e , d e c r e a s e t h e s h i m
t h i c k n e s s ; t o d e c r e a s e t h e " p r e l o a d " t o r q u e , i n -
crease t h e s h i m t h i c k n e s s ( F i g . 30). S h i m s
a r e
a v a i l a b l e
i n t h e
f o l l o w i n g
t h i c k n e s s e s :
0.003,
0.005, 0.010, a n d 0.030 i n c h (0.076, 0.127, 0.254,
a n d 0.762 m m ) .
DRIVE PINION GEAR DEPTH
MEASUREMENT
AND ADJUSTMENT
WITH TOOL SET
C-758-D6
The f o l l o w i n g drive p i n i o n gear depth (i.e., the
depth of the gear teeth mesh between the d r i v e p i n -
ion gear and the r i n g gear) alternate
measurement
and adjustment procedure involves using A x l e Mea-
surement Gauge Tool Set C-758-D6. Tool Set C-758-
D6 is also used to i n s t a l l t h e d r i v e p i n i o n gear shaft
bearing cups.
(1) Position each d r i v e p i n i o n gear shaft bearing
cups i n t h e applicable d i f f e r e n t i a l housing bore.
(2) B e g i n assembling Tool Set C-758-D6 by posi-
t i o n i n g D r i v e P i n i o n Gear Shaft Locating Spacer
Tool SP-5184 (for Model 60 and 6 0 M axles) or Tool
SP-5587 (for Model 70 axles) on the tool p r i m a r y
screw.
(3) Position the drive p i n i o n gear shaft rear bear-
i n g on the tool p r i m a r y screw and insert the screw
( w i t h the bearing) into a n d t h r o u g h the differential
housing bore.
(4) Position the drive p i n i o n gear shaft front bear-
i n g on the tool p r i m a r y screw a t the opposite side of
the differential housing. I n s t a l l Compression Sleeve
Tool SP-535-A, C e n t r a l i z i n g Washer Tool SP-534 and
P r i m a r y Screw N u t Tool SP-533 on the tool p r i m a r y
screw.
(5) Lubricate the drive p i n i o n gear shaft front and
rear bearings w i t h M O P A R H y p o i d Gear L u b r i c a n t
(or an equivalent product).
(6) T i g h t e n the n u t tool, w h i l e r e t a i n i n g the com-
pression sleeve tool w i t h Tool C-3281, and force the
drive p i n i o n gear shaft b e a r i n g cups into the differ-
ential housing bearing cup bores. A l l o w t h e c o m -
p r e s s i o n
t o o l
t o
r o t a t e
s e v e r a l
r e v o l u t i o n s
d u r i n g t h e t i g h t e n i n g p r o c e s s t o p e r m i t t h e b e a r -
i n g r o l l e r s t o p r o p e r l y a l i g n a n d p r e v e n t " b r i n e l -
l i n g " o f t h e b e a r i n g c u p s .
D o n o t r e m o v e t h e t o o l a f t e r i n s t a l l i n g t h e
d r i v e p i n i o n g e a r s h a f t b e a r i n g c u p s . T h e d r i v e
p i n i o n g e a r d e p t h o f m e s h m u s t b e
m e a s u r e d
n e x t .
(7) Loosen t h e n u t tool a n d t h e n r e - t i g h t e n i t suf-
ficiently
to o b t a i n 1 to 3 N n n (10 t o 30 in-lbs) of
bearing "preload" torque. W h i l e t i g h t e n i n g t h e n u t ,
r o t a t e t h e t o o l t o a l i g n t h e b e a r i n g r o l l e r s .
(8) I n s t a l l Gauge Block Tool SP-5260 on Tool Set
C-758-D6 (Fig. 32) and t i g h t e n t h e r e t a i n i n g screw
securely w i t h a n A l l e n wrench.
(9) Position Cross Bore A r b o r Tool SP-5183 (Fig.
32) i n the d i f f e r e n t i a l bearing cradles ( i n the differ-
e n t i a l housing). Center the arbor t o o l i n the cradles
so t h a t an approximately equal space exists a t both
ends.
(10) Observe t h e i n s t a l l a t i o n reference letters and
position the differential bearing caps on the arbor
tool (Fig. 32). I n s t a l l the cap bolts a n d t i g h t e n t h e m
w i t h 14 N*m (10 ft-lbs) torque.
(11) To measure the d r i v e p i n i o n gear depth of
mesh, select a n d insert a feeler gauge blade t h a t
" s n u g l y " fits between the arbor tool a n d the gauge
block tool (Fig. 32). The " f i t " m u s t be " s n u g " b u t not
excessively t i g h t . R e c o r d
t h e t h i c k n e s s
o f
t h e
f e e l e r g a u g e b l a d e so t h a t i t c a n b e u s e d w h e n
d e t e r m i n i n g t h e c o r r e c t d r i v e p i n i o n g e a r d e p t h
s h i m t h i c k n e s s .
Fig. 32 Drive Pinion Gear Depth Measurement
(12) Observe the depth variance etched i n t o the
end of the d r i v e p i n i o n gear (e.g., 0, - 1 , -2, + 1 , + 2 ,
etc.). I f the etched depth variance is a "-" (minus)
value, add i t to the thickness measured and recorded
i n step (11) above. I f t h e etched d e p t h variance is a
" + " (plus) value, subtract i t from t h e thickness mea-
sured and recorded i n step (11) above.
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