Detent Control Cable; Vacuum Modulator And Modulator; Valve Assembly - Pontiac TRANS AM 1977 Service Manual

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TURBO HYDRA-MATIC 250 TRANSMISSION
7A2-13
"SNAP-LOCK" I N
DISENGAGED
POSITION
-
DETENT
CABLE
u
BRACKET
A
G '
TRANS ATTACHIN
FILLER TUBE.
DETENT
CABLE
VIEW B (ASSEMBLED)
MODULATOR PIPE
CARBURETOR
( I N WIDE OPEN
VIEW C
THROTTLE POSITION)
Fig. 7A2-8
Detent Control Cable
ON-CAR SERVICE
CONTROL SHIFTER ASSEMBLY
Removal
1. Lower vehicle and remove two (2) cover mounting
screws and remove console cover assembly (Fig. 7A2-9).
2. Disconnect electrical connector to combination
neutral start and back-up lamp switch and disconnect
quadrant lamp.
3. Disconnect end of shift control cable from shifter
assembly by removing clevis pin and yoke spring from control
cable (Fig. 7A2- 10).
4. Remove four (4) control shifter assembly-to-floor
mounting screws and remove control shifter assembly.
Installation
Reverse removal procedure steps 1 thru 4. Thoroughly
coat pointer inner shaft and guide slot with lub-lithium soap
or equivalent. When installing console cover, insert pointer
into "finger" or detent cover prior to attachment of cover.
Install cover mounting screws and torque to 18 lb. in.
VACUUM MODULATOR AND
MODULATOR
VALVE ASSEMBLY
Removal
1. Disconnect vacuum hose from vacuum modulator
stem and remove vacuum modulator attaching screw and
retainer.
2. Remove modulator assembly and its o-ring seal from
case.
3. Remove modulator valve from case.
Installation
Installation of modulator and modulator valve is the
reverse of REMOVAL. Install a new O-ring seal torque
attaching screw to 130 lb. in. and adjust fluid level.
DETENT CONTROL CABLE (FIG. 7A2-8)
Remove
1. Remove air cleaner.
2. Push up on bottom of snap-lock and release lock and
detent cable.

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Firebird 1977

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