Pontiac FIREBIRD 1972 Service Manual page 337

NON TYPE C DIFFERENTIAL 4A- 13
Fig. 4A-10 Installing Pinion Oil Seal
8. Remove oil seal by prying it out of carrier with a
pointed tool, using care to keep tool away from the
exposed front bearing. Discard seal.
REPLACE
Lubricate lip of new seal with clean gear lube. Coat
outer diameter of seal case with suitable sealer. Install
seal by tapping into place, using J 21285-01 (Fig.
4A-10).
Before installing companion flange, inspect for nicks,
scratches or burred surfaces that may damage the
seal. If any such damage is evident, hone carefully or
install new flange.
a. If a new companion flange is installed, refer to
step 2 under COMPANION F L A N G E
-
RE-
PLACE.
b. If inspection shows the original companion flange
to be satisfactory, replace by holding companion
flange with J 8614-10 and install nut to exactly
the same position as before. Make sure punched
holes and scribe line are in alignment. Tighten
lock nut an additional 1/32" beyond this align-
ment.
CAUTION: DO NOT exceed the additional
tightening of the nut by a distance of more than
1/32" fiom its original positjon, as tightening
the nut in excess of this amount will disturb the
pinion and ring gear tooth contact pattern.
CAUTION: See caution on Page 1 of this section
regarding the Easteners refined to in Step 3
be10 w.
Connect rear universal joint. Tighten U-joint to com-
panion flange bolts (single cardon joint), or 70 Ib. ft.
torque on double cardon to joint.
AXLE SHAFT, AXLE SHAFT BEARING,
BEARING OIL SEAL AND/OR WHEEL
BOLT
REMOVE AXLE SHAFT ASSEMBLIES
NOTE: For
"C" type axle, see Section 4C.
Design allows for axle shaft end play up to .032". This end
play can be checked with the wheel and brake drum
removed by measuring the difference between the end of
the housing and the axle shaft flange while moving the
axle shaft in and out by hand.
End play over .032" is excessive. Inserting a shim inboard
of the bearing to compensate for the end play is not recom-
mended. This ignores end play of the bearing itself and
may result in improper seating of the gasket or backing
plate against the housing. If the end play is excessive, the
axle shaft and bearing assembly should be removed and
the cause of excessive end play determined and corrected.
CAUTION: Use care not to crush exhaust sys-
tem '%kick-under"pipe on B Series station wag-
ons when using an axle engaging hoist.
Remove wheels. (Both right and left wheels have
right hand threads.)
Remove brake drums.
Remove nuts holding retainer plates and brake back-
ing plates. Pull retainers clear of bolts. Reinstall two
lower nuts finger tight to hold brake backing plate in
position.
Pull out axle shaft assemblies, using puller J 21579
and adapter
J 2619-4 with slide hammer J 2619. The
axle seal will come out as a part of the axle shaft
assembly.
CAUTION: The outer race of the axle bearing
MA Y remain in the axle tube. In such a case,
the bearing rollers will be exposed when the
shafl is removed and extra care must be taken
to keep them clean. To remove the outer race
fiom the axle tube it will be necessary to "walk"
out the race with a hooked implement. Do not
attempt to pull the race out straight as this will
cause it to bind.
If the same bearing is to be re-used the race need not be
removed from the axle tube. For differential repairs, the
axle shafts may be removed and replaced without using
new parts.
AXLE SHAFT BEARING
REMOVE
1. Support the axle shaft under the inner retainer and,
using a hammer and chisel, cut a crosswise groove