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FRONT SUSPENSION
2 - 75
back o f t h e r i n g gear (Fig. 49). Ensure t h a t the r i n g
gear teeth and the drive p i n i o n gear teeth are t i g h t l y
"meshed" and "zero" the d i a l indicator pointer.
Fig. 49 Ring Gear "Backlash" Measurement
(7) Insert a small p r y bar between the bearing cap
a n d the left side of the differential case. P r y t h e dif-
ferential case/ring gear as f a r as possible t o w a r d the
r i g h t side o f the differential housing and away f r o m
t h e drive p i n i o n gear (Fig. 49). Observe the d i a l i n -
dicator
plunger
t r a v e l
distance
indicated b y t h e
pointer.
(8) Repeat the measurement several times u n t i l the
indicated plunger t r a v e l distance is consistently the
same for each measurement
a n d t h e n record t h e
t r a v e l distance.
T h e
m e a s u r e m e n t
a b o v e i n d i c a t e s
t h e s h i m
t h i c k n e s s n e c e s s a r y t o e l i m i n a t e t h e r i n g g e a r
" b a c k l a s h " . S u b t r a c t t h i s t h i c k n e s s f r o m t h e d i f -
f e r e n t i a l case " z e r o " " e n d - p l a y " s h i m t h i c k n e s s .
T h e r i n g g e a r " b a c k l a s h " s h i m s m u s t b e p l a c e d
o n t h e h u b a t t h e r i n g g e a r s i d e o f t h e d i f f e r e n -
t i a l case b e t w e e n t h e d i f f e r e n t i a l case a n d t h e
d i f f e r e n t i a l b e a r i n g .
(9) Remove t h e d i a l indicator tool and t h e p i l o t
stud (Fig. 49) from the differential housing.
(10) Remove the differential bearing caps.
(11) Position Spreader Tool W-129-A o n the differ-
e n t i a l housing w i t h t h e tool dowel pins "seated" i n
the locating holes (Fig. 48). I n s t a l l t h e holddown
clamps
a n d t i g h t e n t h e tool t u r n b u c k l e
"finger-
t i g h t " .
(12) I n s t a l l a pilot stud a t the left side of the dif-
ferential housing. A t t a c h D i a l Indicator Tool C-3339
to t h e differential housing ( v i a t h e p i l o t stud) w i t h
the indicator plunger s l i g h t l y "loaded" against t h e
opposite side of t h e differential h o u s i n g ( F i g . 48).
"Zero" the d i a l indicator pointer.
CAUTION: Do not exceed the specified separation
distance when separating the differential housing. If
the housing is over-separated, it could be distorted
or damaged, which would necessitate replacement.
(13) T i g h t e n the spreader tool t u r n b u c k l e (Fig. 48)
and separate the differential housing only enough to
remove t h e differential case f r o m t h e housing. Sepa-
r a t e t h e d i f f e r e n t i a l h o u s i n g a m a x i m u m
d i s -
t a n c e o f 0.38 m m (0.015 i n ) w i t h t h e s p r e a d e r
t o o l . Measure the separation distance w i t h the d i a l
indicator (Fig. 48) as the housing is b e i n g separated.
(14) Remove t h e d i a l indicator tool and t h e pilot
stud (Fig. 48) w h e n t h e differential h o u s i n g has been
separated sufficiently t o remove the differential case
from the housing.
(15) Remove the differential case f r o m the differen-
t i a l housing.
(16) Remove the holddown clamps a n d the spreader
tool f r o m the differential housing (Fig. 48).
(17) Remove the master bearing tools from the dif-
ferential case hubs.
(18) Position t h e " b a c k l a s h " shims ( w i t h t h e r e -
quired thickness determined above) o n the differen-
t i a l case h u b ( r i n g gear side). Place t h e differential
bearing o n t h e h u b a n d i n s t a l l i t w i t h B e a r i n g I n -
stallation Tool C-4025-A and D r i v e r Handle Tool C-
4171 (Fig. 50).
BEARING
INSTALLER TOOL
Fig. 50 Differential Bearing Installation
(19) Position the r e m a i n i n g "zero" "end-play" shims
on t h e h u b a t t h e opposite side o f the differential
case. Include a n additional 0.015-in (0.38-mm) t h i c k
shim o n t h i s h u b to provide the r e q u i r e d differential
bearing "preload" torque.
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