GRIP PRO INSTALLATION MANUAL
9
the bearing cap bolts to the proper
torque value.
40. For Chrysler® 8-1/4” & 9-1/4”, skip
to Step 46.
41. Loosen the RH adjuster nut
(opposite the ring gear) until it is away
from the bearing cup. Tighten the LH
adjuster nut (ring gear side) until the
ring gear is slightly forced into the
drive pinion (zero backlash). Rotate
the differential several revolutions to
ensure no binding is present. Recheck
RH adjuster nut to be sure that it is not
against the RH bearing cup. Use an
appropriate tool to turn adjuster nuts.
42. Install indicator as shown in
Figure
6
. Tighten RH adjuster nut until a case
spread of .008 - .012 is measured.
Rotate drive pinion several times in
each direction to seat the bearings
and to be sure that binding does not
occur. It may be necessary to readjust
the case spread by tightening the RH
adjuster nut.
43. Measure the backlash as done
in Step 6. If necessary, adjust the
backlash until it matches the original
reading taken in Step 6. Increase
backlash by loosening the LH adjuster
and tightening the RH adjuster the
same amount. Decrease backlash
by loosening the RH adjuster nut
and tightening the LH adjuster nut
the same amount. When making
adjustments, always make the final
adjustment in the tightening direction.
For example, if the adjuster need
to be loosened one notch, loosen
it two notches and tighten it one.
When the proper backlash has been
established, install the adjuster nut
locks.
44. Install third member into axle
housing using a new gasket or silicone
sealer and tighten nuts. Reinstall drive
shaft.
45. Skip to Step 47.
46. For Chrysler® 8-1/4” and 9-1/4”
applications, using tool C-4164,
adjust the position of the differential
until the proper backlash reading has
been established. Refer to Step 6 for
the backlash checking procedure
and original backlash reading.
Alternately tighten each adjuster nut
and rotate the differential case several
revolutions to seat the bearings. Being
careful not to change the backlash,
repeat until each adjuster nut has
been tightened to 70 lb ft. Recheck
backlash and correct if necessary.
Install adjuster nut locks.
47. Install axle shafts into housing
being careful not to damage the oil
seals. If your axles have “C” clips, do
the following:
Figure 6
