Dodge RAM TRUCK 1500 1995 Service Manual page 155

REAR SUSPENSION AND AXLE 3 - 3 5
TOOL G3339
PRODUCTION
NUMBERS
8903-29
Fig. 28 Differential Case End Play Measurement
(10) Insert a small pry bar between the bearing
cap and left side of differential case. Pry the case as
far as possible to right side (Fig. 28). Zero the dial
indicator pointer.
(11) Pry the case to left side and record the travel
distance.
The measurement above is the shim thickness
necessary for case zero end-play. The total
thickness will be determined during the ring
gear backlash adjustment.
(12) Remove indicator and pilot stud.
PINION GEAR DEPTH INFORMATION
Gears are supplied as matched sets only. The iden­
tifying numbers for the ring and pinion gear are
etched into the face of each gear (Fig. 29). A plus (+)
number, minus (-) number or zero (0) is etched into
the face of the pinion gear. This number is the
amount (in thousandths of an inch) the depth varies
from the standard depth setting. The standard depth
provides the best teeth contact pattern.
The standard depth is the distance (Fig. 30) from
the centerline of the axle shaft/ring gear to the shoul­
der of the rear pinion bearing.
@ Model 60 axle, the standard
127.00 mm (5.000 inches)
• Model 70 axle, the standard
136.525 mm (5.375 inches).
• Model 80 axle, the standard depth/distance is
147.625 mm (5.812 inches).
Compensation for depth variance is achieved by
two methods. One method is shims placed between
the pinion gear rear bearing cup and housing (Fig.
depth/distance
depth/distance
I S
I S
DRIVE PINION
GEAR DEPTH
VARIANCE
GEAR MATCHING NUMBER
(SAME AS RING GEAR NUMBER;
J9003-100
Fig. 29 Pinion Gear ID Numbers
INNER PINION
BEARING
BUTTON END
CENTERLINE OF
RING GEAR
J9403-56
Fig. 30 Pinion Gear Standard Depth/Distance
31). The second method is selective shim between the
pinion gear head and bearing cone.
If new gear set is being installed, note the depth
variance etched into original and new pinion gear.
Add or subtract the thickness of the original depth
shims to compensate for the difference in the depth
variances. Refer to the Depth Variance charts.
For example, if old pinion is plus (+) 1 and the new
pinion is minus (-) 3, intersecting figure is (+)0.004
inch (0.10mm). Add this amount to the original shim.
Or if the old pinion is (-) 3 and the new pinion is (-)
2, intersecting figure is (-)0.001 inch (0.025mm). Sub­
tract this amount from original shim. Refer to the
Pinion Gear Depth Variance Chart.
If equipped, the oil slinger must be measured
and the thickness included with the total shim
pack thickness.
Depth shim thickness for the new pinion gear must
be determined before installing differential case in
housing.