Service Manual

DIFFERENTIAL OVERHAUL
4 PINION DIFFERENTIAL
NOTE: Two types of differential pinions are used:
1. Early type use hollow pinions with separate
2. Late type pinions are one piece with integral
shafts.
See Figure 1 and 2.
shafts. See Figure 1A and 2A.
1. Early type axles incorporate roll pin holes and
use roll pins to secure
the axle gears. See Figure
1 and 2.
2.
Late type axles incorporate snap ring grooves
and use snap rings to secure
the axle gears. See
Figure 1A and 2A.
Disassembly:
1. Remove the four (4) retaining bolts and nuts.
2. lift off the differential side case together with
the axle shaft and gear.
FIGURE 1
TEETH UP
A
I PIECE PINIONS
FIGURE 1A
3. Remove the axle shaft and gear from the case.
4. Remove the differential bull gear.
5. Note position of the four (4) pinions. Adjacent
pinions are installed in opposite directions, which
make the position of the diagonally opposite
pinions the same.
See Figure 1 and 1A.
6. Remove the pinions (and shafts on the early
type), and remove the remaining axle shaft and
gear from the case.
7. The axle shaft gears may easily be removed by
driving out the roll pins or removing
the snap
rings as required.
Figure
2 & 2A are exploded views of the complete
4 pinion differential assembly.
FIGURE 2
RING GEAR
PINIONS
4 UNION DIFFERENTIAL
FIGURE 2A
DIFFERENTIAL
Assembly:
1. If the axle gears were removed install them on
the axles and install the retaining roll pins or
snap rings as required.
Note: Install the snap rings with the sharp
side
of the snap ring toward the inner end of the
axles.
2. Install one of the axle and gear assemblies in
the differential case and on the early type install
the four
(4) pinion shafts.
3. Install two (2) pinions with their teeth up diag-
onally opposite each other, and install the other
two
(2) pinions with their teeth down diagonally
opposite each other.
See Figure 1 and 1A.
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