Cadillac 60 Series 1963 Shop Manual page 102

HYDRA-MATIC TRANSMISSION
Index No. Index No.
^ (e) Manual linkage to manual valve dis-
connected.
(Check main line oil pressure. Normal
pressure indicates item (d) or (e). Very
low or no oil pressure will indicate item
(a) or (b). No oil pressure will indicate
item (a), (b), or (c).)
13 Condition 2-1853
Reverse internal gear not being held in
reverse.
(a) Reverse stationary cone key not in
place.
(b) Linkage to manual valve loose or im-
properly adjusted.
(c) Reverse clutch piston not applying.
(If the car will move backwards under its
own power, even slightly, also see Index
No. 14.)
14 Condition 2-1858
^Reverse internal gear not being held firmly.
(a) Pressure regulator valve not operating
to provide reverse pressure of 160 to
200 lbs.
(b) Oil Pump output low.
(c) Internal leak in the reverse cone clutch.
(d) Mechanical failure of reverse cone
clutch.
(Check main line pressure in neutral. If
below normal, item (a) or (b) is indicated.
If normal, check main line pressure in
reverse. If below normal when checked in
reverse, item (a) or (c) is indicated. If
main line pressure is normal when checked
in reverse, item (d) is indicated. If car
will move just slightly in reverse, also
see Index No. 13.)
15 Condition 2-1854
Oil circuit difficulty causing stall condition
in reverse.
NOTE: Check manual linkage adjustment.
(a) Rear unit multiple disc clutch applied.
(b) Overrun band applied.
(c) Neutral clutch applied.
(This condition is caused by oil pressure
leaking into the supply passages of item
(a), (b), or (c). Remove overrun band
servo-piston, spring, and accumulator body
complete. Temporarily replace oil lines,
pan, and oil to test. If stall condition in
reverse is present, item (c) is indicated.
If stall condition has been corrected, see
next paragraph.
Replace only the accumulator body, leaving
out the band servo-piston, and spring.
Replace oil pick-up lines, screen, pan, and
oil to test. Stall condition indicates item
(a). If the car has a normal reverse, item
(b) is indicated.
Consult oil circuit chart for possible points
where line pressure could leak into the
passage found to be causing the stall con-
dition. Check these points in the trans-
mission for foreign matter between valve
body surfaces and for damaged surfaces.
Also check for full travel of valves which
are connected with the oil circuit that was
indicated to be faulty.)
16 Conditions 2-0733, 2-0738
Front unit fails to provide reduction in
DRive 4.
(a) Front sprag broken, overrun clutch
operating normally.
17 Conditions 2-0722, 2-0752
(a) Rear sprag broken or flipped over.
(b) Neutral clutch burned up or not apply-
ing.
18 Condition 2-1552
Transmission will not provide a 3-4 up-
shift at full throttle or in DRive 3.
(a) Engine not providing sufficient power.
(b) G2 valve sticking or has limited travel.
(c) Incorrect 3-4 shift valve spring.
(d) Sticking 3-4 regulator plug.
(Check minimum throttle shift points in
DRive 4. If normal, and not excessively
high, item (a) is indicated.)
19 Conditions 2-3062, 2-3072
Rear unit does not provide reduction except
in reverse. (Oil circuit difficulty;
(a) Main line pressure is leaking into the
2-3 clutch apply passage. Inspect 2-3
shift valve and shift valve body.
(b) 2-3 Shift valve stuck open.
20 Condition 3-1852
(a) Overrun band servo-piston sticking
when partially applied.
(b) Neutral clutch not releasing completely.
21 Condition 3-1854
(a) Overrun band servo-piston stuck in
applied position.
22 Conditions 2-0743, 2-0748
(a) Front sprag installed backward.
23 Conditions 2-1819, 2-1859
(a) Overrun clutch burned up or not
applying.
24 Conditions 2-1812, 2-1819
(a) Overrun band burned upor not applying.
Fig. 6-7 Diagnosis Index Chart