Pontiac tempest 1968 Service Manual page 130

S T A N D A R D DIFFERENTIAL 4 A - 7
F i g . 4A - 5 Bearings H e l d in Place by T i e Wire
7. Connect universal joints. Install lock plates
and tighten U-joint to companion flange U-bolt nuts
to 12 lb. ft. torque. If lockwashers are used, tighten
U-bolts nuts to 17 lb. ft. torque.
F i g . 4 A - 7 Removing Drive Pinion Nut
PINION BEARING OIL SEAL-
REMOVE AND REPLACE
NOTE: Check pinion bearing preload before re­
moving companion flange. Proper preload can then
be maintained if inspection of the flange after re­
moval shows damage requiring replacement.
1. With rear wheels off floor, turn rear wheels
and tap brake backing plates with a soft hammer to
ensure that brakes are free.
pinion to measure bearing preload (Fig. 4A-6). Re­
cord reading.
NOTE: Additional clearance to check preload can
be obtained between differential and body by rais­
ing body a few inches by means of a jack or stand
placed under frame at rear.
6. Count the number of exposed threads from top
of pinion stem to lock nut. Remove lock nut with a
heavy duty socket, while holding companion flange
with J 8614-1 (Fig. 4A-7).
2. Remove U-bolts which hold rear universal joint
to companion flange. Use a heavy rubber band or
tape to hold bearings onto journal to prevent loss
of bearing rollers when joint is disconnected if tie
wire has been removed (Fig. 4A-5).
3. Scribe a line on end of pinion stem, extending
down along side of stem threads and onto companion
flange nut.
4. Punch a small mark on the line at pinion stem
end and at top of lock nut, close to pinion stem
threads.
7. Remove companion flange, using puller J 8614-2
and 3 (Fig. 4A-8).
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.
CA UTION: Use care to keep dirt and other foreign
matter out of exposed front pinion bearing.
5. Using a lb. in. torque wrench with a l/2 T T drive
adapter and socket placed over drive pinion nut,
turn two or three revolutions to ensure free move­
ment. Then, take a torque reading while rotating
J 8614-1 J 8614-7
' J 8 6 1 4 - 3
F i g . 4 A - 6 Checking Pinion Bearing Preload
F i g . 4 A - 8 Removing Companion Flange