Speedometer Driven Gear Assembly; Governor Assembly - Pontiac FIREBIRD 1972 Service Manual

TWO SPEED AUTOMATIC (M-35) TRANSMISSION
7F-35
Fig. 7F-59 Air Checking Converter
c. Remove leak test fixture.
2. Check converter hub surfaces for signs of scoring or
wear.
3. Check seams of converter for stress or breaks and
replace converter if necessary. The converter is a
welded assembly and no internal repairs are possible.
VACUUM MODULATOR ASSEMBLY
INSPECT
1. Inspect modulator-to-case gasket. Discard if nicked,
cut or deteriorated.
2. Check vacuum modulator plunger and valve for
nicks or burs. If such minor imperfections cannot be
repaired with a slip stone, replace the part.
3. Check vacuum modulator diaphragm with a vacuum
source for leakage. However, diaphragm leakage nor-
mally results in transmission oil pull-over, which is
evident in a smoky exhaust and continually low
transmission fluid. No vacuum modulator repairs are
possible; replace as an assembly.
SPEEDOMETER DRIVEN GEAR
ASSEMBLY
INSPECT
1. Inspect oil seals for nicks, cuts or deterioration. Dis-
card damaged seals.
2. Check driven gear and shaft for wear or damage.
Replace if necessary.
Fig. 7F-60 Removing or Installing Extension Housing
Bushing
EXTENSION HOUSING ASSEMBLY
INSPECT
1. Wash extension housing thoroughly with cleaning
solvent and air dry.
2. Inspect housing for cracks that may contribute to
leakage.
3. Inspect rear oil seal and remove if damaged or worn.
4. Inspect rear bushing for damage or excessive wear. If
necessary to replace, remove rear oil seal and:
a. Using Drive Handle J 8092 and Bushing Tool J
21424-9, drive bushing into housing and remove
(Fig. 7F-60).
b. With new bushing in pilot end of Tool J 21424-9,
drive it into place in housing bore.
5. If rear oil seal were removed in steps 3 or 4, coat outer
casing of new seal with sealing compound and drive
it into place, using Seal Installer J 5 154. Prelubricate
between lips of seal with cup grease.
GOVERNOR ASSEMBLY
DISASSEMBLE
NOTE: Governor valve and shaA were already
remo ved during transmission disassembly.
1. Remove outer weight assembly by sliding toward
center of governor body, remove large snap ring and
remove weight assembly from governor body (Fig.
7F-61).
2. Remove smaller inner weight retaining snap ring,
inner weight and its spring from outer weight.