Setting Pinion Depth; Removing Companion Flange; Removing Rear Pinion Bearing; Installing Rear Pinion Bearing Outer Race - Pontiac Grand Prix Service Manual

4A-20
1969
PONTIAC SERVICE MANUAL
Fig. 4A-34 Removing Companion Flange
2. If replacing front pinion bearing, install new outer
race by using installer J 86 1 1-0 1-P, J 78 17-T, F, or G.P.
with driver handle J 8092 (Fig. 4A-37).
SETTING PINION DEPTH
The pinion bearing shim thickness (pinion depth) must
be determined:
a. whenever a new housing (carrier and tube assembly)
is to be used,
and/or b. new bearings and races are installed.
or c. the pre-repair investigation indicates the drive
pinion bearing shim should be changed.
Ring and pinion gear sets are matched in a special test
machine. All production pinions are marked on face of
PONTIAC O N L Y
J 11493 TEMPEST,
pinion gear in thousandths of an inch if they vary from
a "nominal" setting. When a pinion is marked "+I'
(plus), it means that the pinion is located too far away
from the centerline of the ring gear. Shims must be
added to move the pinion closer to the ring gear and
position the pinion at the nominal setting. When a
pinion is marked
"-"
(minus), it means the pinion
shims must be removed to move the pinion away from
the ring gear and position the pinion at the nominal
setting. All pinions p,roduced for service are "nominal"
or "zero" pinions and are unmarked.
Pinion depth is set with pinion depth setting gauge J
21777 which consists of the following: one J 21777-1
cross shaft assembly, two J 21777-3 discs (Pontiac), one
J 21777-2 "A" & "B" gauge plate, one 58619-12 pilot,
one J 2 1777-8 washer (Pontiac only) and one J 86 19- 13
bolt and nut. A J 8001 dial indicator must also be used
with the cross shaft. The pinion depth setting gauge
provides in effect a "nominal" or "zero" pinion as a
.
gauging reference.
1. Make certain all gauge parts are clean. Check
particularly the discs, gauge pin ends, dial indicator tip
and gauge plate surface.
2. Lubricate front and rear pinipn bearings and
position them in their respective races in camer.
Bearings used with gauge must be those to be installed
in car, in order to ensure accurate reading.
3. Pontiac
-
Thread J 21777-8 washer onto J 8619-13
bolt to end of thread. Thread J 8619-13 bolt into J
21777-2 gauge plate, so plate rests against J 21777-8
washer. Insert assembled gauge plate and bolt through
front and rear bearings with underside of plate against
J 21777-8 washer (Fig. 4A-38). Slip J 8619-12 pilot
over bolt end, with underside against front bearing.
Tighten nut finger tight while rotating gauge plate to
Fig. 4A-35 Removing Rear Pinion Bearing
Fig. 4A-36 Installing Rear Pinion Bearing Outer Race