4-28 REAR AXLE DIFFERENTIAL CARRIER
B ea rin g
Support
C a s e
Support Fixture
Fig. 5 L -ln s ta llin g D iffere ntial Bearings
limits shown in "Specifications" the case must be re
placed.
5. Carefully inspect shims for uniform thickness and re
place any split shims in the pack. Where various thick
ness of shims are used in a pack, the thickest shim
should be used between the thin shims.
6
. If even the slightest wear is indicated on thrust washers
they should be replaced.
7. Inspect spider arms for wear and distortion.
8
. Check radial clearance between differential side gears
and differential case, also fit of differential pinions on
spider.
2. Install idler pinion pins (24) in left-hand differential
case (23); then install idler pinions (25) on pins (24).
3.
Install high speed clutch plate (26) on support case with
bevel edge of clutch teeth toward the idler pinions, then
tap gear lightly until seated.
4. Position left-hand support case (29) on ring gear; then
install ring gear bolts (9) and nuts. Tighten nuts alter
nately and evenly.
Pinion a nd Cage-Assem bly
1. Press straight roller (48) onto pinion (28), then stake
end of pinion using a round nosed punch.
2. Press pinion inner tapered bearing cone (49) onto pin
ion (28) with wide portion of cone toward pinion teeth,
until seated against shoulder. Use Tool J-3493 and
space bearing from tool with a discarded pinion bearing
spacer.
3. Press tapered roller bearing cups (52) and (58) into cage
until seated tightly against shoulders in case. Installer
Tool J-22377 (18,500 lb. axle) or J-21106 (23,000 lb.
axle) may be used for this purpose.
4.
Install pinion and bearing assembly in pinion cage. In
stall same bearing adjusting spacer (50) and spacer
washer if required (51) as removed at disassembly.
Press outer bearing cone (59) on pinion.
5. Place companion flange washer (60) on bearing cone
(59).
6
.
Install oil seal assembly (62) into retainer (63) and ap
ply strip sealer onto seal retainer.
7.
Press seal retainer into pinion bearing cage (54).
8
. Press pinion flange (64) on pinion. Install washer (65)
and nut (
6 6
). Tighten nut (fig.
6
L) to torque listed in
"Specifications."
9. Check and adjust pinion bearing pre-load as instructed
in ’Rear Axle Adjustments (Eaton Axles)."
Differen tiat-A ssem b/y
1. Press differential bearing cones
( 8
and 31) onto support
case hubs using support fixture J-3941 as shown in
Figure 5L.
2. Install thrust washer (22) on hub of left side gear, with
chamfered edge of washer next to gear, then place side
gear in left- hand differential case (23).
3. Place pinions (19) and pinion thrust washers (18) on
spider (
2 0
); then lay assembly on side gear with gear
teeth in mesh.
4. Position right-hand side gear (17) on pinion gears; then
place side gear thrust washer (16) on gear hub with
chamfered edge of washer next to gear.
5.
Install right-hand differential case (15) on left-hand
case with punch marks on case halves aligned (fig. 4K).
6
.
Install and tighten differential case bolts (14). Check
assembly for free rotation of gears. Thread lock wire
through bolt heads in such a manner that wire will be
drawn tighter if bolts should loosen.
Planetary Unit-Assem bly
1. Place support case thrust washer (11) in right-hand
support case; then position differential assembly in case.
Fig. 6L-R em oval and In sta lla tio n of C om panion Flange
CHEVROLET OVERHAUL M A N U A L SUPPLEMENT
Summary of Contents for 40 60 Series
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