Cadillac 60 Series 1963 Shop Manual page 154

PROPELLER SHAFT AND REAR AXLE
7-5
to install 0-100 inch-pound torque wrench and
Adapter, J-2571-2, to check torque required to
rotate pinion shaft, Fig. 7-3.
If torque is low, tighten pinion nut slightly and
again measure the inch-pounds torque required to
rotate pinion shaft. Repeat this operation, tight-
ening the nut slightly each time, until specified
torque is obtained. It will require approximately
200 foot-pounds torque on pinion nut to obtain
proper bearing pre-load.
CAUTION: Do not overtighten, and never
back off on the nut to reduce pre-load torque.
The average torque on an assembly with over
1,000 miles is between 15 and 20 inch-pounds.
The torque on a new assembly is approximately
50 inch-pounds.
8. Remove Holding Tool Adapters, J-21044,
from flange.
9. Stake pinion shaft into nut.
10. Connect rear universal joint to pinion
flange. Apply parking brake to prevent propeller
shaft from turning and install four screws and
lock washers, tightening screws to 65 foot-pounds.
CAUTION: Do not use a pry bar or heavy
tool to hold propeller shaft when tightening
flange attaching screws, otherwise universal
joint bearing seals will become damaged.
11. Refill rear axle to correct level as de-
scribed in Section 2, Note 4. Use only the special
lubricant available from factory Parts Ware-
houses for cars equipped with a Controlled Dif-
ferential.
12. Reinstall brake drums and rear wheels, and
lower car.
3. Rear Axle Pinion Yoke and Oil Seal
Removal and Installation (75 Series
and Commercial Chassis)
When replacing the rear axle pinion yoke or oil
seal, follow the procedure outlined below. Failure
to do so may result in overloaded pinion bearings
or drive pinion end play.
a. Removal
1. Raise rear end of car, and remove both rear
wheels and brake drums to eliminate drag when
measuring torque readings.
2. Disconnect rear universal joint from pinion
yoke.
3. Using a 0-100 inch-pound torque wrench,
with Socket, J-2571-1, and Adapter, J-2571-2,
measure inch-pounds torque required to rotate
pinion shaft slowly for at least 2 turns, Fig. 7-7.
Record the torque reading.
Fig. 7-7 Checking Pinion Shaft Pre-Load Torque
(75 series cars and commercial chassis)
4. Install Pinion Yoke Holding Tool, J-6544, on
yoke and install two attaching nuts.
5. Install Socket, J-2571-1, on pinion nut
through hole in Holding Tool and remove nut,
using 3/4 inch drive socket wrench.
6. Remove washer from pinion shaft and mark
pinion shaft and yoke with a punch so that yoke can
be installed in same position on spline.
7. Remove pinion yoke from pinion shaft using
Puller, J-6295-01, Fig. 7-8.
8. Pry out pinion oil seal.
9. Remove staking burrs on pinion shaft threads
with a small file or a 7/8 inch x 14 thread die.
Rear Axle Pinion Yoke
Puller J-6295-01
Fig. 7-8 Removing Pinion Yoke