TM 9-2320-280-34
19-3. DIFFERENTIAL REPAIR (Cont'd)
NOTE
If the old pinion is marked -3 and the new pinion is marked +2,
the procedure would be as follows: Refer to Old Pinion Marking
column at left side of table and locate -3 in this column. Then read
to right, across table, until under +2 in New Pinion Marking
column. Box where two columns intersect is amount of shim
thickness change required. In this case, the number in the
intersecting box is -0.005 in. (0.12 mm) which represents the
amount to be subtracted from the old shim thickness. If the box
number had been a + figure, this amount would be added to the
old shim thickness.
This table determines an initial shim thickness. The actual pinion
depth measurement must be performed and final shim thickness
adjusted as necessary.
Pinion shims are available from 0.084-0.111 in. (2.13-2.82 mm) in
increments of 0.0005 in. (0.0125 mm).
3.
Refer to Old and New Pinion Marking columns on pinion variance table. Note on table where old
and new pinion depth variances intersect, this will determine amount to be added or subtracted
from original pinion depth shim for desired pinion depth 'starter shim".
Table 9-1. Pinion Variance Table Inches)
OLD
NEW PINION MARKING
PINION
MARKING
-4
-3
-2
-1
0
+1
+2
+3
+4
+4
+0.008
+0.007
+0.006
+0.005
+0.004
+0.003
+0.002
+0.001
0
+3
+0.007
+0.006
+0.005
+0.004
+0.003
+0.002
+0.001
0
-0.001
+2
+0.006
+0.005
+0.004
+0.003
+0.002
+0.001
0
-0.001
-0.002
+1
+0.005
+0.004
+0.003
+0.002
+0.001
0
-0.001
-0.002
-0.003
0
+0.004
+0.003
+0.002
+0.001
0
-0.001
-0.002
-0.003
-0.004
-1
+0.003
+0.002
+0.001
0
-0.001
-0.002
-0.003
-0.004
-0.005
-2
+0.002
+0.001
0
-0.001
-0.002
-0.003
-0.004
-0.005
-0.006
-3
+0.001
0
-0.001
-0.002
-0.003
-0.004
-0.005
-0.006
-0.007
-4
0
-0.001
-0.002
-0.003
-0.004
-0.005
-0.006
-0.007
-0.008
19-12
