Chevrolet 1977 10 Series, Repair Manual, Page: 151 / 468

REAR AXLE DIFFERENTIAL
4B-79
CAM PLATE
GUIDE CLIP (6)
WAVE SPRING
CAM FORM
SIDE GEAR
SPLINED DISC (3)
EARED DISC (6)
SPLINED DISC
(LARGE SPLINE)
THRUST RING
PRESS TO SHOULDER
F ig. 4 B -9 H --C a m P la te a n d C lu tc h D isc
NOTE:
Compress disc pack by pushing down on the
discs to keep the splined discs from becoming wedged
between the thrust ring and gear shoulder while pressing
the sub-assembly together. Completed sub-assembly
should be checked for proper disc sequence. Also, make
sure the first splined disc (large spline) is properly
located on the cam plate.
Reassembly
1. Install (6) clutch pack guide clips on the ears of the
cam gear clutch pack using grease for retention.
2. Install cam gear assembly and original shim in right
side case half. If a new thrust ring has been pressed on the
cam gear, reshimming may be necessary. Measure the overall
length of the new cam gear assembly, including the shim and
compare to the dimension obtained in Step A o f cam gear
service section. If the length of the new assembly varies by
mroe than .003" larger or smaller than the original
dimension, reshimming will be necessary. Select a shim which
will result in a reading closest to the original.
NOTE:
INCORRECT SHIMMING WILL DISTURB
CRITICAL CLEARANCE DIMENSIONS AND MAY
RESULT IN DIFFERENTIAL FAILURE.
3. Install right side reaction block on gear face with
b u tton side o f block facing up. Use original block unless
severely scored or worn. If new block is used, determine
face-to-face thickness of original blcok with calipers and
replace with a service block o f the same thickness.
NOTE:
INCORRECT BLOCK THICKNESS WILL
DISTURB CRITICAL CLEARANCES AND MAY
RESULT IN DIFFERENTIAL FAILURE.
4. Preassemble pinions and pinion thrust washers on
pinion yoke. Index yoke to proper position and install in
housing with center over b utton end of reaction block. A
light tap on the yoke may be needed to seat it in the housing.
5. Install left side reaction block unless severely scored
or worn. If new block is used, determine face-to-face
thickness o f original block with calipers and replace with a
service block o f the same thickness.
NOTE:
Right and left side reaction blocks may not be
the same thickness. If blocks are broken or cannot be
accurately measured for thickness, the entire differential
must be replaced. Incorrect block thickness will disturb
critical clearances and may result in differential failure.
6. Install governor assembly and latching bracket in
their respective locations. Place straight end of latching
brakcet spring over and to the outside o f the governor shaft
to preload the ltaching bracket against the governor
assembly.
7. Install the original (3) eared and (2) splined clutch
plates on the left side gear alternately, starting and ending
with an eared disc.
NOTE:
O R IG IN A L D ISC S MUST BE USED.
ATTEMPS TO INSTALL OTHER THAN ORIGINAL
DISCS WILL DISTRUB CRITICAL CLEARANCES
AND MAY RESULT IN DIFFERENTIAL FAILURE.
8. Install (6) clutch pack guide clips on the left side disc
pack assembly using grease for retntion.
9. Install original shim in left side case half.