Chevrolet 1980 Light Duty Truck Service Manual page 340

4B-16 REAR AXLE
Fig. 4B-23~Pressing Out Wheel Stud
3. Position propeller shaft to one side and tie it to
frame side rail.
4. Measure the torque required to rotate the pinion,
as shown in figure 4B-24. Record the torque for later
reference.
5. Scribe a line down pinion stem, pinion nut, and
flange to aid on reinstallation. Make sure lines show the
relationship of components accurately. Count the number
of exposed threads on pinion stem, and record for later
reference. See figure 4B-25.
6. Install Tool J-8614-11 on pinion flange and remove
pinion flange self-locking washer faced nut as shown in
figure 4B-26. (Position J-8614-11 on flange so that the four
notches are toward flange.) Save scribed nut for
reinstallation.
7. Thread pilot end of Tool J-8614-3 into small O.D.
end of J-8614-2. Then with J-8614-11 installed as in Step
6, insert J-8614-2 into J-8614-11 and turn it 45 degrees to
locked position. Remove flange by turning J-8614-3 while
holding J-8614-11 as shown in figure 4B-27.
Fig. 4B-25--Scribe Marks
8. Pry old seal out of bore, using a screw driver or a
hammer and chisel.
Inspection
1. Inspect pinion flange for smooth oil seal surface,
worn drive splines, damaged ears, and for smoothness of
bearing contact surface. Replace if necessary.
2. If deflector requires replacement, remove by
tapping from flange, clean up stake points; install new
deflector, and stake deflector at three new equally spaced
positions. Staking operation must be performed in such a
manner that the seal operating surface is not damaged.
Installation
1. Lubricate cavity between the seal lips of the pinion
flange oil seal with a lithium-base extreme pressure
lubricant.
2. Position seal in bore and place gauge plate J-22
over seal and against seal flange. The gauge plate
proper seating of seal in carrier bore.
3. Use J-21057, as shown in figure 4B-28, to press seal
into carrier bore until gauge plate is flush with the carrier
shoulder and seal flange. Turn gauge plate 180° from
Fig. 4 B-26~Rem oving Nut from Drive Pinion
a s