Pontiac FIREBIRD 1972 Service Manual page 1087

TURBO HYDRA-MATIC (M-38) TRANSMISSION 7G-49
rNOTE: LUBRITED (DARK COLORED) CAST IRON RlNG
J - l MANUAL VALVE AND LINK ASSEMBLY
i
14 1-2 SHIFT VALVE
I
2
PRESSURE REGULAlOR VALVE
I5 I - 2
SHIFT CONTROL VALVE
3
PRESSURE REGULATOR VALVE SPRING
c
16 1-2
SHIFT CONTROL VALVE SPRING
A 4 REVERSE AND MODULATOR BOOST VALVE 17 1.2 SHIFT CONTROL VALVE SLEEVE D
5 INTERMEDIATE BOOST VALVE 18 RETAINING PIN
6 BOOST VALVE SLEEVE
i
I 9 M A N U A L LOW CONTROL VALVE
7
RETAINING PIN
20 M A N U A L LOW CONTROL VALVE SPRING
8 2.3 SHIFT V A L V E
21 PLUG
9 2 - 3 SHIFT VALVE SPRING
22 RETAINING PIN
10 2.3
SHIFT CONTROL VALVE
23
DFTENT REGULATOR VALVE
1 1 2.3 SHIFT CONTROL VALVE SPRING 24 DETENT REGULATOR VALVE SPRING SEAT C ;
12 2 - 3 SHIFT CONTROL VALVE SLEEVE 25 DETENT REGULATOR VALVE SPRING
13 RETAINING PIN
26
RETAINING PIN
2 7
DETENT VALVE
28
DETENT V A L V E SPRING
29 DETENT V A L V E SPRING SEAT
30 DETENT VALVE SPRING RETAINER
31 DETENT VALVE STOP
32 DETENT VALVE ACTUATING LEVER BRACKET
33 DETENT VALVE ACTUATING LEVER
34 RETAINING BOLT
.35 RETAINING PIN
-36 DIRECT CLUTCH ACCUMULATOR SPRING
37 OIL SEAL RING
38 DIRECT CLUTCH ACCUMULATOR PISTON
. 3 9 RETAINER R l N G
Fig.
7 6 - 7 6
Exploded View of Valve Body
valve actuating lever, bolt, detent actuating lever
bracket, detent valve stop, spring seat retainer, spring
seat, spring and detent valve.
Place Accumulator Compressor J 21885 on top of
piston lugs of the direct clutch accumulator piston,
compress piston evenly and remove retainer "E"
ring.
Remove tool, direct clutch accumulator piston, metal
oil seal ring and direct clutch accumulator spring.
From lower right hand bore, compress boost valve
sleeve and, turning valve body over, remove retaining
pin, boost valve sleeve assembly, pressure regulator
valve spring and pressure regulator valve. Then,
remove reverse and modulator boost valve and inter-
mediate boost valve from boost valve sleeve.
From next bore up, compress 2-3 shift control valve
sleeve and remove retaining pin, 2-3 shift control
valve sleeve assembly, 2-3 shift valve spring and 2-3
shift valve. Then, remove 2-3 shift control valve and
control valve spring from 2-3 shift control valve
sleeve.
,
From next bore up, compress 1-2 shift control valve
sleeve and remove retaining pin, 1-2 shift control
valve sleeve assembly and 1-2 shift valve. Then,
remove 1-2 shift control valve and control valve
spring from 1-2 'shift control valve sleeve.
9. From next bore up, compress manual low control
valve plug and remove retaining pin, plug, manual
low control valve spring and manual low control
valve.
10. From top bore, remove retaining pin, detent regula-
tor valve spring, valve spring seat and detent regula-
tor valve.
INSPECT
1. Wash all parts in cleaning solvent, air dry and blow
out all passages.
2. Inspect all valves for scoring, cracks and free move-
ment in their respective bores.
3. Inspect sleeves for cracks, scratches or distortion.
4. Inspect valve body for cracks, scored bores, intercon-
nected oil passages and flatness of mounting face
(Fig. 7G-77).
5. Check all springs for distortion or collapsed coils.