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7A3-6
1977 PONTIAC SERVICE MANUAL
First speed only
-
no 1-2 shift
1. Governor assembly.
2. Control valve assy.
3. Case
4. Intermediate clutch
First and second
1. Control valve assy.
speeds only; no
2-3 shift
2. Direct clutch
la. Governor valve sticking.
b. Driven gear loose, damaged
or worn (check for pin in case
and length of pin showing);
also, check output shaft drive
gear for nicks or rough finish
if driven gear shows damage.
2a. 1-2 shift valve train stuck
closed.
b. Governor feed channels
blocked.
c. Valve body gaskets
-
leaking,
damaged, incorrectly installed.
3a. Porosity between channels.
b. Governor feed channel blocked.
Governor bore scored or worn,
allowing cross pressure leak.
4a. Clutch piston seals-missing,
improperly assembled, cut.
b. Intermediate roller clutch
broken spring or damaged cage.
la. 2-3 shift train stuck.
b. Valve body gaskets
-
leaking, damaged, incorrectly
installed.
2a. Pump hub
-
direct clutch
oil seal rings
-
broken,
missing.
b. Clutch piston seals
-
missing
improperly assembled, cut,
piston, ball check stuck
or missing.
Drive in Neutral
1. Manual linkage
2. Forward clutch
1. Misadjusted.
2. Clutch does not release
-
(this condition will also
cause No Reverse).
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