Pontiac FIREBIRD 1972 Service Manual page 944

TURBO HYDRA-MATIC (M-40) TRANSMISSION 7E-55
4. Inspect governor valve for nicks, burrs, scoring or
galling.
5. Check governor valve for free operation in bore of
governor sleeve.
6. Inspect governor driven gear for nicks, burrs or dam-
age.
7. Check governor driven gear for looseness on gover-
nor sleeve.
8. Inspect governor weight springs for distortion or
damage.
9. Check governor weights for free operation in their
retainers.
GOVERNOR DRIVEN GEAR
-
REPLACE
To facilitate governor repair in the field, a governor driven
gear and replacement pins are available for service use.
The service package contains a nylon driven gear, two
governor weight retaining pins and one governor gear
retainer split pin. Replacement of gear must be performed
with care in the following manner:
1. Drive out governor gear retaining split pin, using,
small punch (Fig. 7E-92).
2. Support governor on 7/64" plates installed in exhaust
slots of governor sleeve, place in arbor press and, with
long punch, press gear out of sleeve.
3. Carefully clean governor sleeve of chips that remain
from original gear installation.
4. Support governor on 7/64" plates installed in exhaust
slots of sleeve, position new gear in sleeve and, with
suitable socket, press gear into sleeve until nearly
seated. Carefully remove any chips that may have
shaved off gear hub and press gear in until it bottoms
on shoulder.
5. A new pin hole must be drilled through sleeve and
gear. Locate hole position 90' from existing hole,
center punch and then, while supporting governor
in press, drill new hole through sleeve and gear using
a standard 1/8" drill.
6. Install retaining pin.
7. Wash governor assembly thoroughly to remove any
chips that may have collected.
GOVERNOR
-
ASSEMBLE
1. Install governor valve in bore of governor sleeve.
2. Install governor weights and springs and thrust cap
on governor sleeve.
3. Align pin holes in thrust cap, governor weight assem-
blies and governor sleeve and install new pins. Crimp
both ends of pins to prevent them from falling out.
4. Check governor weight assemblies for free operation
on pins and governor valve for free movement in
governor sleeve.
5. Check for valve opening at entry (feed) and exhaust
ports of governor-as follows:
a. Check valve opening at entry (feed) port with a
feeler gauge as shown with governor weights ex-
tended completely outward (Fig. 7E-93).
b. Check valve opening at exhaust port with a feeler
d
Fig. 7 E - 9 2 Checking Feed Port
Fig. 7 E - 9 3 Checking Exhaust Port