Chevrolet 1973 Overhaul Manual page 43

4 - 1 2 REAR AXLE DIFFERENTIAL CARRIER
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. Record this
size.
14. Check the rear face of the drive 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 pinion head.
17. Lubricate the rear pinion bearing with liberal
amounts of hypoid lubricant and install rear
bearing onto pinion, using J-8609 as shown in
figure 21 A.
Installation and Adjustment
1. Lubricate the front bearing with liberal amounts of
hypoid lubricant, and place into outer cup.
Fig. 21A—Drive Pinion Rear Bearing In sta lla tio n
that many thousandths from
PROTECTIVE
TUBE OR PIPE
J - 8 6 0 9
Fig. 22A—In sta llin g Pinion Oil Seal
2. Place a new pinion oil seal into position in carrier
bore. Tap lightly with a protective plate and a
hammer until seal flange seats against carrier, as
shown in figure 22A.
3. Coat lips of pinion oil seal and seal surface of
pinion flange with gear lube.
4. Install a new pinion bearing spacer onto the drive
pinion.
5. Remove nut and sleeve from Companion Flange
Installer J-9458. Screw J-9458 onto drive pinion and
insert assembly into housing.
6. Position companion flange onto drive pinion. Install
sleeve and nut onto J-9458.
7. Install Companion Flange Holding Tool J-8614-11.
See Figure 23A.
8. Tighten nut on Tool J-9458 which draws drive
Fig. 23A —Drive Pinion Flange In sta lla tio n
OVERHAUL MANUAL