Chevrolet 1977 10 Series, Repair Manual, Page: 340 / 468

(400)7A-20 OVERHAUL MANUAL
a. (Models CG, CJ and CP) Remove retaining pin, 1-2
m odulator bushing, 1-2 valve spring, 1-2 m odulator valve,
and 1-2 shift valve.
b. (All other models) Remove retaining pin, 1-2
m odulator bushing, 1-2 regulator valve, 1-2 regulator spring,
1-2 detent valve and 1-2 shift valve.
6. From next bore down, remove retaining pin, 2-3 shift
valve spring, 2-3 m odulator valve bushing, 2-3 m odulator
valve, 3-2 interm ediate spring, and 2-3 shift valve.
7. From next bore down remove retaining pin, bore plug,
spring, spacer, and 3-2 valve.
8. At other end of assembly, top bore, remove retaining
pin and bore plug, detent valve, detent regulator valve, spring
and spacer.
9. From the next bore down, remove the 1-2
accum ulator valve train as follows:
a. (Model CP) Remove the grooved retaining pin, bore
plug, 1-2 accum ulator valve and spring.
b. (Models CB, CG, CJ, CL and CS) Remove the
grooved retaining pin, bore plug, 1-2 accum ulator valve.
c. (Models CF, CM and CT) Remove the grooved
retaining pin, bore plug, 1-2 accum ulator secondary spring
and 1-2 accum ulator valve.
Inspection
NOTE:
See Fig. 7A-66C. Do not remove the teflon oil
seal ring from the front accum ulator piston unless the
oil seal ring requires replacement. For service, the oil
seal ring is cast iron.
1. Inspect all valves for scoring, cracks and free
movement in their respective bores.
2. Inspect bushings for cracks, scratches or distortion.
3. Inspect body for cracks, or scored bores.
4. Check all springs for distortion or collapsed coils.
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M ODELS CB, CG, CJ, CL & CS I
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M O D E L CG, CJ & CP
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14 15 2 9 16
MODELS CF, CG*, CM & CT |
Manual Valve
Retaining Pin
Bore Plug
Detent Valve
Detent Regulator
Valve
Spacer
Detent Regulator
Valve Spring
1 -2 Shift Valve
9.
9a.
10 .
1 0
a.
11 .
12.
13.
14.
1-2 Detent Valve
1-2 Modulator Valve
1-2 Regulator Valve
Spring
1-2 Mod. Valve Spring
1-2 Regulator Valve
1-2 Modulator
Bushing
Retaining Pin
Retaining Pin
15.
Bore Plug
2 2
. 2 -3 Modulator
16.
1-2 Accumulator
Bushing
17.
Valve
23. Retaining Pin
1-2 Primary
24.
3 - 2 Valve
Accumulator Spring 25.
Spacer
18.
2 -3 Shift Valve
26.
3 - 2 Valve Spring
19.
3 - 2 Intermediate 27.
Bore Plug
Spring 28.
Retaining Pin
2 0
.
2 -3 Modulator Valve 29. 1 -2 Accumulator
2 1
.
2 -3 Shift Valve
Valve Sec. Spring
Spring
* L A T E R DESIGN
Fig. 7A-67C--Control Valve Assembly-Exploded Vie w