Pontiac Grand Prix Service Manual page 566

TURBO HYDRA-MATIC TRANSMISSION M-38
7G-3
Fig. 7G-2 Transmission Model Identification
number from original cover to the new cover. All
transmission Darts returned to Pontiac Motor Division.
and any coimunications concerning same, must be
identified by transmission identification and vehicle
identification numbers.
PERIODIC SERVICE RECOMMENDATIONS
TRANSMISSION FLlllD
Transmission fluid level should be checked (with
transmission hot) every time engine oil level is checked
or every 6,000 miles when engine oil is changed.
CAUTION: Since the Turbo Hydra-Matic (M-38)
transmission is very sensitive to oil level, special pre-
cautions should be taken when checking the oil level
to ensure against an overfill (see Checking Procedure,
page 7G-7).
Transmission fluid should be changed every 24,000
miles or 24 months. When the car is in heavy duty
service (police, taxi, fleet service or for cars subjected
to heavy city trafflc during hot weather), it is
recommended that the fluid be changed at 12,000 mile
intervals.
ADJUSTMENTS WITH TRANSMISSION IN
CAR
SHIFT CONTROL AND BACK DRIVE LINKAGE
ADJUSTMENT
COLUMN SHIFT CONTROLS
NOTE: For Tempest modelr, see Fig. 7G-3; for Firebird
models, see Fig.
7G-4.
1. Loosen screw (Tempest) or nut (Firebird) on
adjusting swivel clamp.
2. Set transmission range selector lever in PARK
detent.
NOTE: Obtain PARK position by rotating transmission
range selector lever clockwise (view A).
3. Set upper gearshift lever in PARK position and lock
ignition.
4. Push up on gearshift control rod to take up
clearance in steering column lock mechanism and
tighten screw on adjusting swivel clamp to 20 lb. ft.
(Tempest); tighten nut on adjusting swivel clamp to 30
lb. ft. (Firebird).
CONSOLE SHIFT CONTROLS
NOTE: For Tempest models, see Fin. 7G-5; for Firebird ./
modelr, see Fig.
YG-~.
1. Disconnect shift cable from transmission range
selector lever by removing nut from pin.
2. Adjust back drive linkage by following the procedu-
res under COLUMN SHIFT,CONTROLS.
3. After adjusting column controls, unlock ignition and
rotate transmission range selector lever counterclock-
wise two detent positions.
4. Set console gearshift lever in NEUTRAL range and
move it forward against its stop in NEUTRAL.
5. Assemble shift cable and pin to transmission range
selector lever, allowing cable to position pin in slot of
lever and then install and tighten nut to 30 lb. ft.
torque.
NEUTRALIZER SWITCH ADJUSTMENT
Refer to CHASSIS ELECTRICAL SERVICE, Section
12.
DETENT CABLE ADJUSTMENT
TEMPEST (Fig. 7G-7)
The detent cable is adjusted from inside the driver's
compartment in the following manner:
1. With engine off and throttle valves closed (carbu-
retor off fast idle, position the retainer (see view B)
against the insert on the detent cable.
2. To adjust the cable, grasp the throttle pedal lever
adjacent to the detent cable and pull the carburetor
cable to the wide open throttle position.