Pontiac TRANS AM 1977 Service Manual page 913

TURBO HYDRA-MATIC 200
7A1-13
F. Roller Clutch Asm. 1. Springs missing in the
roller clutch.
2. Rollers gaulled, or
missing.
F. Converter 1. Turbine hub broken loose
from turbine.
HIGH OR LOW OIL
PRESSURES (See Fig.
7A 1-8)
A. Throttle Valve Asm.
1. Misadjusted, binding,
unhooked, or broken.
2. Wrong throttle lever to
cable link.
3. Wrong T.V. cable.
B. Manual Valve 1. Not connected to inside
detent lever pin.
C. Throttle Lever and
Bracket Asm.
- -
1. Binding, unhooked or
mispositioned.
D. T.V. Exhaust Valve 1. Bent or binding.
Lifter Rod (Causes
High Line Pressure)
E. Pressure Regulator
Valve & Spring
1. Valve binding.
2. Wrong spring-(Check pres-
sure regulator bore plug
leaking.
F. Control Valve Asm. 1. Throttle valve or throttle
valve plunger binding.
2. Shift T.V. valve binding.
3. Intermediate boost valve
binding
--
pressures will
be incorrect in Intermediate
and Low ranges only.
4. Reverse boost valve binding--
pressures will be incorrect in
Reverse range only.
G. Valve Body Spacer 1. "Intermediate Boost"
Plate orifice plugged in spacer
plate.
2. "Reverse Boost"
orifice plugged in the spacer
plate.
H. Pump Assembly 1. Low oil pressure
2. Damaged gears and damaged
pump gear pocket.
3. Cup plugs missing.
4. Mismatched pump cover/
Pump body.
5. Oil pressure control
orifice in pump cover plugged,
causing high line pressure.
I. Forward Clutch Asm. 1. Cup plug missing from tur-
bine shaft.