Cadillac 60 Series 1963 Shop Manual page 103

6-10
HYDRA-MATIC TRANSMISSION
Pressure Checking
Gauge Tool
No. J-5907
Fig. 6-8 Checking O i l Pressure
4. External Leaks
When investigating external oil leaks, first de-
termine whether leak originates from trans-
mission or engine. A red aniline dye preparation
should be added to the oil in whichever unit is
suspected of leaking. Red dye appearing in the
leakage oil will then give a positive identification.
If oil leak is found to be in transmission, check
for leaks in areas described below. It will be
necessary to remove flywheel housing front and
lower covers to determine location of leakage in
flywheel housing area.
a. Front End
NOTE: In Fig. 6-9, numbered arrows,
corresponding to the descriptions below, point
out locations of possible leaks at front of trans-
mission.
1. Torus drain plug loose or improperly
installed.
2. Torus cover to flywheel seal not installed
properly, or damaged. Check for possible ob-
struction at point where flywheel seal retainer
contacts flywheel.
3. Flywheel screws not torqued to specifi-
cations.
4. Front seal leak - Check front seal to see
that it is correctly installed and is not damaged.
When installing a new front seal, make sure
that bore is free from staking material and that
garter spring on seal is correctly positioned. Also
check finish of torus cover neck and bearing sur-
face in flywheel housing.
5. Flywheel housing - Inspect flywheel housing
for indications of oil seepage through casting.
6. Flywheel housing to case seal - Improperly
installed or damaged. Check groove depth with
seal in place. Seal must be at least .015 inch
above machined surface before installation.
7. Torus, cover - Inspect weld at torus cover
neck for indications of leakage. See Note 19 for
checking procedure.
b. Extension Housing
1. Rear seal not installed properly or damaged.
2. Gasket (extension housing to case) improper-
ly installed.
3. Gasket (reverse piston housing to case) im-
properly installed.
4. Reverse piston housing and extension housing
attaching screws not torqued to specifications.
5. Breather pipe or speedometer gear housing
not tight.
Fig. 6-9 Points of Possible O i l Leaks