Chrysler Vehicle User Manual page 78

TJ
FRONT AXLE - 181FBI (Continued)
ADJUSTMENTS
Ring and pinion gears are supplied as matched
sets only. The identifying numbers for the ring and
pinion gear are etched/marked onto each gear (Fig.
1). A plus (+) number, minus (–) number or zero (0) is
etched/marked on the pinion gear. This number is
the amount (in thousandths of an inch) the depth
varies from the standard depth setting of a pinion
etched/marked with a (0). The standard setting from
the center line of the ring gear to the back face of the
pinion is 92.08 mm (3.625 in.). The standard depth
provides the best gear tooth contact pattern.
Fig. 1 PINION GEAR ID NUMBERS
1 - PRODUCTION NUMBERS
2 - PINION GEAR DEPTH VARIANCE
3 - GEAR MATCHING NUMBER
Compensation for
achieved with a select shim/oil slinger. The shims are
placed between the rear pinion bearing and the pin-
ion gear head (Fig. 2).
If a new gear set is being installed, note the depth
variance etched into both the original and replace-
ment pinion. Add or subtract this number from the
thickness of the original depth shim/oil slinger to
pinion depth variance
Fig. 2 SHIM LOCATIONS
1 - PINION GEAR DEPTH SHIM/OIL SLINGER
2 - DIFFERENTIAL BEARING SHIM
compensate for the difference in the depth variances.
Refer to the Pinion Gear Depth Variance chart.
Note where Old and New Pinion Marking columns
intersect. Intersecting figure represents plus or
minus the amount needed.
Note the etched number on the face of the pinion
gear head (–1, –2, 0, +1, +2, etc.). The numbers rep-
is
resent thousands of an inch deviation from the stan-
dard. If the number is negative, add that value to the
required thickness of the depth shims. If the number
is positive, subtract that value from the thickness of
the depth shim. If the number is 0 no change is nec-
essary.
FRONT AXLE - 181FBI 3 - 19