Control Valve Assembly; Assembly Of Rear Servo; Disassembly Of Control Valve Assembly; Removing Retaining E-Ring From Rear Servo Pin - Pontiac Grand Prix Service Manual

TURBO HYDRA-MATIC-M-40 7 3-2 5
Fig. 7E-65 Removing Retaining E-Ring from Rear
Servo Pin
3. Inspect band apply pin for scores or cracks.
4. Inspect accumulator and servo pistons for cracks or
porosity.
ASSEMBLY OF REAR SERVO
1. Install spring retainer, spring and washer on band
apply pin.
2. Install band apply pin, retainer, spring and washer
into bore of servo piston and secure with E-ring.
3. Install oil seal on servo piston, if removed.
4. Install outer and inner oil rings on accumulator
piston, if removed, and assembly 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-67).
4. Remove front accumulator piston and spring (Fig.
7C-68).
5. From the top right hand bore, remove the 1-2 valve
train as follows (Fig. 7E-69):
a. (All models except PA, PC and PR) Remove roll
pin, 1-2 modulator bushing, 1-2 regulator valve, 1-2
regulator spring, 1-2 detent Zralve and 1-2 shift valve.
b. (Models PA, PC and PR) Remove roll pin, 1-2
modulator bushing, 1-2 modulator spring, 1-2 modula-
tor valve and 1-2 shift valve.
RETAINING
E -RING
ACCUMULATOR PISTON
SPRING RETAINER
S E R V O PIN
Fig. 7E-66 Exploded View of Rear Servo and
A c c u v l ~ l a t o r