Dodge 2000 DURANGO Service Manual page 141

DN
ADJUSTMENTS
8 1/4 AXLE PINION GEAR DEPTH
GENERAL INFORMATION
Ring gear and pinion are supplied as matched sets
only. The identifying numbers for the ring gear and
pinion are painted onto the pinion gear shaft and the
side of the ring gear. A plus (+) number, minus (–)
number or zero (0) along with the gear set sequence
number (01 to 99) is on each gear. This first number
is the amount (in thousandths of an inch) the depth
varies from the standard depth setting of a pinion
marked with a (0). The next two numbers are the
sequence number of the gear set. The standard depth
provides the best teeth contact pattern. Refer to
Backlash and Contact Pattern Analysis Paragraph in
this section for additional information.
Compensation for
achieved with select shims. The shims are placed
behind the rear pinion bearing (Fig. 69).
Fig. 69 Shim Locations
1 – AXLE HOUSING
2 – COLLAPSIBLE SPACER
3 – PINION BEARING
4 – PINION DEPTH SHIM
5 – PINION GEAR
6 – BEARING CUP
If a new gear set is being installed, note the depth
variance marked on both the original and replace-
ment pinion. Add or subtract the thickness of the
original depth shims to compensate for the difference
in the depth variances. Refer to the Depth Variance
chart.
pinion depth variance
Note where Old and New Pinion Marking columns
intersect. Intersecting figure represents plus or
minus the amount needed.
Note the painted number on the shaft of the pinion
gear (–1, –2, 0, +1, +2, etc.). The numbers represent
thousands of an inch deviation from the standard. 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.
PINION DEPTH MEASUREMENT AND ADJUSTMENT
Measurements are taken with pinion bearing cups
and pinion bearings installed in the axle housing.
Take measurements with Pinion Gauge Set and Dial
Indicator C-3339 (Fig. 70).
(1) Assemble Pinion Height Block 6739, Pinion
Block 8540, and rear pinion bearing onto Screw 6741
is
(Fig. 70).
(2) Insert assembled height gauge components,
rear bearing, and screw into axle housing through
pinion bearing cups (Fig. 71).
(3) Install front pinion bearing and Cone-Nut 6740
hand tight (Fig. 70).
(4) Place Arbor Disc 8541 on Arbor D-115-3 in posi-
tion in axle housing side bearing cradles (Fig. 72).
Install differential bearing caps on Arbor Discs and
tighten cap bolts to 41 N·m (30 ft. lbs.).
NOTE: Arbor Discs 8541 has different step diame-
ters to fit other axles. Choose proper step for axle
being serviced.
(5) Assemble Dial Indicator C-3339 into Scooter
Block D-115-2 and secure set screw.
(6) Place Scooter Block/Dial Indicator in position
in axle housing so dial probe and scooter block are
flush against the rearward surface of the pinion
height block (Fig. 70). Hold scooter block in place and
zero the dial indicator face to the pointer. Tighten
dial indicator face lock screw.
(7) With scooter block still in position against the
pinion height block, slowly slide the dial indicator
probe over the edge of the pinion height block.
8 1/4 AND 9 1/4 AXLE 3 - 91