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113 OVERDRIVE
in relation to the center of the axle. If there are
no figures showing a plus or minus sign, it
denotes a zero pinion setting and a zero "0"
will be shown.
11. Install drive pinion rear bearing cone and
rollers using 1-2643 cone replacer, Figure 14.
FIGURE 14
12. Install pinion rear bearing cup, using tool
J-2645 and handle J-872-5, placing shims be-
tween cup and housing.
The amount of shims used is determined by
the amount of shims removed at disassembly and
by the plus or minus figure etched on pinion. For
example, if the original pinion was marked +2 and
had a shim pack of .035" behind the rear bearing
cup, and the new pinion to be installed is marked
-1, the shim pack must be increased by .003" to
bring the new pinion to its correct position. The
new shim pack will, therefore, be .038" thick.
Shims for the rear pinion bearing are available in
.003", .005", and .010" thickness.
13. Install the drive pinion front bearing cup,
using replacer J-5367. Insert the drive pin ion
in position and install the front bearing cone
and rollers. Coat bearing with axle lubricant.
14. Make sure the differential bearing bores in
housing are clean. Mount discs of pinion set-
ting gauge J-5223 on gauge arbor and install
gauge in housing bores, Figure 15. Place
differential bearing caps in position and tighten
bolts finger tight.
FIGURE 15
15. With gauge block held in position against end
of drive pinion by clamp screw, loosen thumb
screw in end of gauge block and move plunger
out of block until head contacts gauge arbor as
shown in Figure 15. Lock plunger by turning
thumb screw, using care not to disturb plunger
position.
16. Back off screw in clamp holding gauge block
against pinion, remove gauge block and with a
2 to 3 inch micrometer, measure distance from
end of anvil to top of plunge r head as shown in
Figure 16. This measurement represents the
distance from the rear face of the drive pinion
to the center line of the rear axle and should be
2.343" for the 11 tooth, 4.27:1 ratio and 13
.tooth 3.54:1 and 3.31:1 ratio
FIGURE 16
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