Pontiac tempest 1968 Service Manual page 508

T W O SPEED A U T O M A T I C T R A N S M I S S I O N 7F-7
T R A N S M I S S I O N
TRANSMISSION
SELECTOR L I V E !
V I E W B
STARTER NEUTRALIZER
SWITCH I N S T A L L A T I O N
1. POSITION GEARSHIFT LEVER
IN "DRIVE" POSITION.
(SEE VIEW A)
2. INSERT SWITCH "DRIVE TANG"
IN SHIFTER TUBE SLOT AND
ASSEMBLY SWITCH TO
STEERING COLUMN JACKET.
3. INSERT ADJUSTING G A G E
IN SWITCH. MOVE GEAR
SELECTOR TO "PARK-
POSITION & REMOVE
ADJUSTING G A G E .
ADJUSTING G A G E
NEUTRALIZER
SWITCH
STEERING
COLUMN
STEERING
COLUMN
VIEW SHOWING SWITCH INSTALLATION
VERTICAL < £ OF
STEERING COLUMN
ADJUST SLOT
ROD f O F HOLE IN
SWITCH ASSEMBLY
SWITCH "DRIVE TANG"
IN DRIVE POSITION
VIEW A
RESET SLOT
J-22701
NEUTRALIZER SWITCH
GAUGE SET (5)
TRANSMISSION
BRACKET
< SWIVEL
CLAMP
ROC
SELECTOR LEVER
>£v LUBRICATE A R E A S INDICATED
v W I T H CHASSIS LUBRICANT
FRAME
F i g . 7 F - 6 Firebird Column Shift Linkage
INSPECTION AND REPAIRS
Check modulator valves for burrs. If such minor
imperfections cannot be removed with a slip stone,
replace valve.
The modulator diaphragm can be checked with vac­
uum source for leakage. However, diaphragm leak­
age normally permits transmission oil pull-over,
which is evident as smoky exhaust and continually
low transmission oil level. No modulator repairs
are possible; replace as an assembly.
Inspect case to vacuum modulator oil seal. Dis­
card seal if it is nicked, cut or deteriorated.
INSTALLATION
1. Install modulator valve assembly into case
bore. Refer to F i g . 7F-16 for correct assembly
sequence.
2. Assemble oil seal on vacuum modulator and in­
stall assembly into case bore.
3. Secure modulator assembly with retainer and
bolt and tighten bolt 10 lb. ft. torque. Connect vac­
uum hose.
SPEEDOMETER DRIVEN GEAR AND SLEEVE
REMOVAL
1. Disconnect speedometer cable.
2. Remove speedometer driven gear sleeve re­
tainer bolt.
3. Remove retainer and speedometer driven gear
assembly.