Pontiac tempest 1968 Service Manual page 142

S T A N D A R D DIFFERENTIAL
4A-19
G A U G E P L A T E
J 21777-2
Fig. 4A-34 Securing G a u g e Plate in Carrier
NOTE: The piston depth setting tool is designed
so that a perfect dial indicator reading of .100"
would require no shim. This is why the reading
obtained must be subtracted from .100".
9. Examine ring gear and pinion for nicks, burrs
or scoring. Any of these conditions will require
replacement of gear set.
10. Select correct pinion shim to be used during
pinion reassembly on the following basis:
NOTE: Pontiac - Fifteen (15) shims are avail­
able in increments of (. 002") two thousandths from
.020" to .050" (Fig. 4A-37).
Tempest or Firebird - Ten (10) shims
are available in increments of (.002") two thou­
sandths from .020" to .038" (Fig. 4A-37).
a. If reusing production pinion, and pinion is
marked (plus), correct shim will have a thick­
ness equal to gauge reading found in step 7, plus
the amount specified on pinion.
b. If production pinion is marked " - " (minus),
correct shim will have a thickness equal to gauge
reading found in step 7, less the amount specified
on pinion.
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J 2 1 7 7 7 - 2
J 21777-2 *,
F i g . 4A-35 Gauge Plate Installed