ADJUST DIFFERENTIAL BEARING PRE-LOAD
A. Remove thrust block using drift to drive pin out of
B. Install differential bearing spacers in the original
positions if new bearing cups are installed.
SPACERS MUST BE INSTALLED WITH THE
CHAMFERED EDGE TOWARD THE MACHINED
SURFACES IN THE HOUSING.
Bearing pre-load may be increased or decreased
by using a thicker or thinner spacer respectively in
the cover half of the assembly.
The gear may be moved toward the pinion,
decreasing the gear lash, by decreasing the
thickness of the spacer in the case half and
increasing the thickness of the spacer by the
same amount in the cover half. Reversing this
C. Insert pipe used for disassembling through case half.
transposition will move the gear away from the
pinion and increase the gear lash.
The correct pre-load of .006" to .010" tight is
obtained as follows:
1. Increase or decrease the thickness of the
spacer used in the COVER HALF to obtain a
freely rotating gear with from .000" to .005"
2. Remove spacer in cover half and install a
spacer ".006" plus the end play" thicker than
the spacer used to obtain the adjustment in
the above paragraph.
3. If a new gear or case has been installed, check
runout at back face of gear. Correct and
recheck if runout exceeds .005".
4. When adjustment is satisfactory, remove cover
Position differential and gear assembly over pipe
and move differential and gear out on support
with gear facing the case half and slide into position.
sufficient to permit installation of pinion and
E. Install new gasket over case flange.
F. Position cover half over pipe and draw axle halves
H. Install thrust block and pin.
together with six bolts equally spaced.
G. Check differential and gear assembly end play with
INSTALL PINION AND CAGE ASSEMBLY
dial indicator through thrust block pin hole against
A. Coat cage flange contact surface with non-hardening
sealing compound. Position cage assembly over
Both the differential bearing pre-load and gear
studs and tap into position with soft mallet.
lash are controlled by selective spacers, available
in increments of .003", which are installed
between the differential bearing cups and the case
and cover halves of the axle housing.