Chevrolet 1977 10 Series, Repair Manual, Page: 337 / 468

AUTOMATIC TRANSMISSIONS
(400)7A-17
Fig. 7 A - 5 9 C -- C h e c kin g V alve O p e n in g W i t h W e i g h t I n w a rd
11. Check valve opening at exhaust (.020" minimum)
with a feeler gauge, holding governor as shown with governor
weights completely inward (Fig. 7A-59C).
Governor Driven Gear Replacement
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:
Fig. 7 A - 6 0 C - R e m o v i n g G o v e rn o r Gear R e ta in in g Pin
1. Drive out governor gear retaining split pin using small
punch (Fig. 7A-60C).
2. Support governor on 7/64 inch plates installed in
exhaust slots of governor sleeve, place in arbor press, and
with a 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 inch plates installed in
exhaust slots of sleeve, position new gear in sleeve and, with
a suitable socket, press gear into sleeve until nearly seated.
SERVO SPRING
SPRING RETAINER
TEFLON OIL SEAL RING
RETAINER RING
SERVO PIN
SERVO PISTON
Fig. 7A-6 1 C--Front Servo Assembly-Exploded Vie w