Buick LeSabre 1965 Service Manual page 383

REAR AXLE
6-17
Fig. 6-38—Alignment Marks
paint to provide alignment for re-
assembly. See Figure 6-38.
5. Loosen six bolts holding cover
half of case to cap half. Remove
assembly from vise, place on
bench with bolt heads up, and re-
move bolts.
6. Lift cap half of case from
flange half. Remove cap half, cone
brake, p r e l o a d springs, spring
block, and side gear shims if
provided, from assembly so that
they can be reinstalled in their
original positions.
7. Remove corresponding p a r t s
from flange half of case and keep
with flange half.
b. Cleaning and Inspection
of Parts
1. Make certain all parts are ab-
solutely clean and dry.
2. Inspect pinion shaft, pinion and
side gears, brake cone surfaces
and corresponding cone seats in
the case. The cone seats in the
case should be smooth and free of
any excessive scoring. Slight
grooves or scratches indicating
passage of foreign material are
permissible and normal. The land
surface on the heavy spirals of
the male cones will duplicate the
case surface condition. Replace
any parts which are excessively
scored, pitted or worn. Both
halves of case must be replaced
if one half is damaged or worn.
c. Assembly of Differential
CAUTION: When assembling the
unit, use axle shafts as mounting
tools to assure proper gear and
cone spline alignment. Do not
ignore this procedure as it will
be impossible to install shafts at
final assembly and attempting to
force the shafts into position may
result in damage to the spring
thrust blocks.
1. Clamp one axle shaft in a vise
allowing three inches to extend
above vise jaws. Then place the
cap side of differential case over
extended axle shaft with interior
of case facing up. See Figure
6-39.
2. Install proper cone over axle
shaft splines, seating it into po-
sition in cap half of case. NOTE:
Be certain that each cone is in-
stalled in proper case half since
tapers and s u r f a c e s become
matched and their p o s i t i o n s
should not be changed
3. If unit was originally assem-
bled with shims located between
side gears and cones for back-
lash adjustment, reinstall side
gear with shim so that gear may
seat on shim. If unit was orig-
inally assembled without shims,
Fig. 6-40—Installing Parts into Cap
Half of Differential Case
4. Place one spring block in po-
sition over gear face in align-
ment with pinion gear shaft
grooves. I n s t a l l thrust block,
pinion shaft, pinion gears and
thrust washers into cap half of
differential case in such a manner
that pinion shaft retaining dowel
can be inserted through pinion
gear shaft into differential case.
This prevents the pinion shaft
from sliding out and causing dam-
age to the carrier assembly. See
Figure 6-40.
5. Insert springs into s p r i n g
thrust block that is already in-
stalled into case, and then place
second thrust block over springs.
See Figure 6-41.
6. Install second side gear face
down on spring thrust block so
DIFFEI
CASE
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Fig. 6-39-Axle Shaft & Cap Half of
Differential Positioned in a Vise
Fig. 6-41—Installing Preload Springs
and Second Thrust Block Into
Differential Case