Buick LeSabre 1965 Service Manual page 378

6-12
REAR AXLE
Fig. 6-26—Installing Pinion Oil Seal
using I n s t a l l e r J-21128. See
Figure 6-26.
4. Coat lips of pinion oil seal;
seal surface of pinion flange with
gear lube. Install pinion flange
on pinion by tapping with a soft
hammer until a few pinion threads
project through flange.
5. Install pinion washer and nut.
Hold c o m p a n i o n flange with
Holder J-8614-01. While inter-
mittently rotating pinion to seat
bearings, tighten pinion nut until
end play begins to be taken up.
See Figure 6-27.
CAUTION: When no further end
play is detectable and when Before assembling the differ-
6. Check preload by using an inch
pound torque wrench as shown in
Figure 6-28.
CAUTION: After preload has been
checked, final tightening should be
done very cautiously. For ex-
ample, if when checking, preload
was found to be 5 inch pounds,
additional tightening of the pinion
nut as little as 1/8 turn can add
5 additional inch pounds drag.
Therefore, the pinion nut should
be further tightened only a little
at a time and preload should be
checked after each slight amount
of tightening. Exceeding preload
specifications will compress the
collapsible spacer too far and
require its replacement.
7. While observing the preceed-
ing caution, carefully set preload
drag at 20 to 30 inch pounds on
new bearings or 15 to 20 inch
pounds on used bearings.
8. Rotate pinion several times to
assure that bearings have been
seated. Check preload again. If
drag has been reduced by rotat-
ing pinion, re-set preload to
specification.
d. Assemble Differential
Case Assembly
Holder J-8614 will no longer pivot
freely as pinion is rotated, pre-
load specifications are b e i n g
neared. Further tightening should
be done only after preload has
been checked.
Fig. 6-27—Installing Pinion Nut
ential, examine the wearing sur-
faces of all parts for scoring or
unusual wear. Also make certain
that all parts are a b s o l u t e l y
clean. Lubricate parts with rear
axle l u b r i c a n t just b e f o r e
assembly.
1. Place side gear thrust washers
over side gear hubs and install
side gears in case. If same parts
are reused, replace in original
sides.
2. Position one pinion (without
washer) between side gears and
rotate gears until pinion is di-
rectly o p p o s i t e from loading
opening in case. Place other pin-
ion between side gears so that
pinion axle holes are in line, then
rotate gears to make sure holes
in pinions will line up with holes
in case.
INCH POUNDS
TORQUE WRENCH
Fig. 6-28—Checking Pinion Bearing
Preload
3. If holes line up, rotate pinions
back toward loading opening just
enough to permit sliding in pinion
thrust washers.
4. Install pinion axle. Install pin-
ion axle retaining bolt. Torque
to 20-28 ft. lbs.
5. After making certain that mat-
ing surfaces of case and ring
gear are clean and free of burrs,
thread two 3/8-24 x 2 studs into
opposite sides of ring gear, then
install ring gear on case. See
Figure 6-29. Install ring gear
attaching bolts just snug. Torque
bolts alternately in progressive
stages to 50-60 ft. lbs.
6. If differential s i d e bearings
were removed, install new bear-
ings using Installer J-21132 with
Driver Handle J-8092. See Fig-
ure 6-30.
Fig. 6-29—Installing Ring Gear on
Differential Case