Chevrolet 1973 Overhaul Manual page 66

9. Preload the dial indicator one half revolution, and
tighten in this position.
10. Select the button on the gauge plate that
corresponds to the ring gear size and rotate the
plate until the plunger rests directly upon that
button.
11. Rock the plunger rod slowly back and forth across
the button until the dial indicator reads the greatest
deflection. At this point, set the dial indicator to
zero. Tools will now be positioned as shown in
figure 22C.
12. Repeat the rocking action of the plunger several
times to verify the setting.
13. Once the zero reading is obtained, swing the
plunger until it is removed from the gauging plate
button.
The dial indicator will now read the required pinion
shim thickness for a "nominal" pinion.
Fig. 21C—M easuring R o tating Torque
REAR AXLE D IFFERENTIA L CARRIER 4 -3 5
Fig. 22C—Pinion Depth Gauging Tools Installed
14. Check the rear face of the pinion being installed
for a pinion code number. This number indicates
the necessary alteration of the pinion shim
thickness as determined in step 13.
a. If the pinion is stamped with a plus ( + )
number, that many thousandths to the
add
indicator reading. For example, if indicator
reading is .019, and pinion is marked ( + 2), the
correct depth shim for installation will be .019
+ .002 = .021 inch.
b. If the pinion has no plus ( + ) or minus (—)
number, use the indicator reading as the correct
shim thickness.
c. If the pinion is stamped with a minus (—)
number,
subtract
the indicator reading. For example, if the
indicator reading is .031, and pinion is marked
(—3), the correct depth shim for installation will
be .031 — .003 = .028 inch.
15. Remove bearing caps and depth gauging tools from
carrier.
16. Position the shim selected in step 14 on the pinion
shaft against the pinion head.
17. Install the rear bearing on drive pinion, using
J-8609 as shown in figure 23C.
Installation and Adjustment
1. Lubricate pinion bearings and outer races and
place drive pinion in carrier.
2. Place a new pinion bearing spacer over pinion so it
seats on inner race of rear bearing.
3. Slide pinion front bearing cone and roller assembly
over pinion shaft so it seats against spacer.
4. Pack the cavity between the seal lips of the pinion
flange oil seal with a lithium-base extreme pressure
lubricant.
5. Place oil seal in carrier bore and tap into position
that many thousandths from
OVERHAUL MANUAL