Chevrolet 1977 10 Series, Repair Manual, Page: 148 / 468

4B-76
OVERHAUL MANUAL
Fig. 4 B -4 H -G o v e rn o r and L a tc h in g B ra c k e t
followed. Failure to do so may disturb critical
clearances and could result in differential
complaints.
Internal components can be inspected through
the windows o f the differential housing.
I f the governor assembly and latching bracket
are the only items to be replaced, proceed only
through step No. 2 o f the disassembly procedure.
To install new governor and latching bracket, begin
at step No. 6 o f the reassembly procedure.
Fig. 4B -5 H -B e arin g Puller J-2 6 2 5 2
Disassembly
1. Note position of governor and latching bracket
assembly, Figure 4B-4H. Remove ring gear and side bearings
following procedures established for the standard differential.
2. Using bushing puller tool No. J-26252, remove
governor assembly and latching bracket by pulling the
retaining bushings as shown in Figure 4B-5H. Pull the
latching bracket sPring out of the way while pulling the
governor assembly bushing to prevent damage. Remove the
stop pin by driving through the case with a drive pin punch.
3. Remove lock screw and pinion shaft, and roll out
differential pinion gears.
4. Remove thrust block and pinion thrust washers.
5. Remove cam gear, disc pack assembly and disc pack
guide clips.
6. Remove plain side gear and shims.
Inspection
1. Clean all parts with solvent. Inspect all bearing for
chipping or evidence of excessive wear. Replace parts as
needed.
2. Inspect all differential components for excessive wear
and breakage. Replace parts as needed. The following are
serviceable com ponents for this differential:
• G overnor assembly and latching bracket with spring
and stop pin.
• Cam plate.
• Clutch disc pack with guides and guide clip.
• Pinion cross-shaft.
• Pinion gears.
• Pinion thrust washers.
• Reaction block (4 sizes).
• T hrust ring.
• Flange end shim (4 sizes).
CAUTION: Attem pts to service other components
may disturb critical clearances and could result in
differential complaints.
I f reaction block or flange end shim m ust be
replaced, the original pieces m ust be carefully
measured for thickness and replaced with a piece
o f the same size.
C A M /C LU TC H SERVICE
Disassembly
If cam plate or clutch discs m ust be replaced, the cam
gear sub-assembly m ust be serviced as follows:
1. M easure and record overall length of gear assembly
(front face of gear to back side of thrust ring, include shim).
This dimension will be needed to reassembly unit if thrust
ring is replaced.
DO NOT REPLACE THRUST RING
UNLESS NECESSARY.
If ring is excessively worn or
scored, check bore in case for scoring. If bore is scored,
replace entire differential.
2. W ith gear hub end up, compress disc pack and install
jaws of split ring bearing remover (J-22912) between the
thrust ring and the top eared disc. Bevel side of bearing
remover should face up tow ard thrust ring.
3. Place cam gear assembly with bearing remover
attached in an arbor press supporting the bearing remover
on both sides.
4. Install a 1-1/2" to 1-3/4" diam eter plug similar to
(J-8107-4) on gear hub. Press against plug with ram of press
to remove thrust ring. Keep all components in the proper
order, Figure 4B-6H.