Cadillac 60 Series 1963 Shop Manual page 100

HYDRA-MATIC TRANSMISSION
b. Reverse Pressure Check
1. Place selector lever in Reverse position and
note pressure with engine running at 480 RPM.
This reading should be as high or higher than
previous pressure checks in drive range.
2. With selector lever in Reverse, apply foot
brake and increase engine speed to half throttle.
Pressure should increase to 175 psi minimum.
The pressure range under this condition should be
from 175 psi to 200 psi.
If pressure readings are below specified
amounts for any of these tests a malfunctioning
oil pressure regulator or a leak in the system is
indicated.
3. Fluid Leakage Precautions
The several precautions that must be observed
to prevent fluid leaks are as follows:
1. Use new gaskets and O-ring seals whenever
there is a disassembly.
2. Use a very small amount of petrolatum to
hold gaskets and thrust washers in place during
assembly, or to seal gaskets. Never use gasket
paste or shellac.
3. Make sure that composition cork and paper
gaskets are not wrinkled or creased when in-
stalled. Make sure that gaskets have not stretched
or shrunk during storage.
4. Make sure the square type O-ring seals are
installed squarely and are not twisted during
assembly.
5. Make sure that mating surfaces of castings
are flat and smooth, free of deep scratches, chips,
and burrs.
Coupling Signal
G-1
Overrun Clutch
Oil Pump Intake
Reverse
Line Drop
Neutral Clutch
Coupling Feed
Rear Clutch
Reverse
Drain Back
TV Pressure
Overrun Servo
Line Pressure
G-2
G-1
Fig. 6-6 Transmission Case O i l Passages