Pontiac TRANS AM 1977 Service Manual page 918

7A1-18 1 9 7 7 PONTIAC SERVICE MANUAL -
SLIPS ON 1-2 SHIFT A. Low Oil Level
1. Oil will aerate. Correct
oil level.
B. Throttle valve cable 1. Not adjusted properly.
C. Intermediate servo
piston & cover asm.
1. Incorrect usage of piston
and cover.
2. Wrong band apply pin.
(Refer to Chassis Service manual
for selection procedure.)
3. Porosity in piston.
4. Seals damaged or missing.
5. Excessive leakage between
band apply pin and case.
D. Control valve asm. 1. Throttle valve binding.
2. Shift T.V. valve binding.
3. 1-2 accumulator valve
sticking, causing low 1-2
accumulator pressure.
E. 1-2 accumulator piston 1. Piston seal cut or missing.
and spring 2. Leak between piston and
pin in control valve assembly.
3. Spring broken or missing.
F. Case
1. Porosity in 2nd clutch
passages.
G. Pump Assembly 1. Forward clutch feed hole
in the pump cover sleeve does
not line up with "Drive"
oil in the pump cover casting.
H. Intermediate Band
1. Worn or burned.
I. Forward Clutch Asm. 1. Forward clutch feed passage
intersects with lube passage
in the turbine shaft.
-
ROUGH 1-2 SHIFT
- - - -
A. Throttle Valve Cable 1. Not adjusted properly.
2. Binding.
3. Wrong or damaged cable.
B. Intermediate Servo 1. Wrong band apply pin.
Assembly (See Chassis Service manual for
correct selection.)
2. Servo piston to case oil
seal ring damaged or missing.
C. Control Valve Asm. 1. T.V. plunger binding.
2. Throttle valve binding.
3. Shift T.V. valve binding.
4. 1-2 accumulator valve
binding.