Control Valve Assembly - Pontiac tempest 1968 Service Manual

T U R B O H Y D R A - M A T I C TRANSMISSION
7E-27
R E T A I N I N G
E - R I N G
S E R V O P I N
Fig. 7E-63 Exploded View of Rear Servo and Accumulator
3. Install oil seal on servo piston, if removed.
4. Install outer and inner oil rings on accumu­
lator piston, if removed, and assemble into bore of
servo piston.
CONTROL VALVE ASSEMBLY
DISASSEMBLY OF CONTROL VALVE ASSEMBLY
1. Position control valve assembly with cored face
up and accumulator pocket toward operator.
2. Remove manual valve from upper bore.
3. Install special tool J 21885 on accumulator
piston valve and remove retaining ring (Fig. 7E-64).
4. Remove front accumulator piston and spring
(Fig, 7 C - 6 5 ) .
5. From the top right hand bore, remove the 1-2
valve train as follows:
a. (All models except PA and PC) Remove
retaining pin, 1-2 modulator bushing, 1-2 regu­
lator valve, 1-2 regulator spring, 1-2 detent valve
and 1-2 shift valve.
6. From next bore, remove retaining pin, 2-3
shift valve spring, modulator valve bushing, 2-3
modulator valve, 3-2 intermediate spring and 2-3
shift valve.
7. From next bore, remove retaining pin, bore
plug, spring, spacer and 3-2 valve (Except P B and
PT models).
b. (Models PA and PC) Remove retaining pin,
1-2 modulator bushing, 1-2 modulator spring, 1-2
modulator valve and 1-2 shift valve.
Fig. 7 E - 6 4 Installing Compressor Tool to
Front Accumulator Piston