Cadillac 60 Series 1963 Shop Manual page 105

6-12
HYDRA-MATIC TRANSMISSION
4. The transmission to radiator lower tank
cooler pipes must be checked for any grounding
to exhaust system, frame, or sheet metal to avoid
high magnification of normal oil pump and gear
noise levels.
Use Diagnosis Chart, Fig. 6-10, as a guide for
locating sources of noise.
a. Front Unit
The front unit planetary gears may be heard in
Dr-4, Dr-3, Lo and Reverse selector ranges. In
forward driving ranges, this gearset operates in
reduction in first and third speeds. Gear noise
from a planetary unit is usually heard as a whine,
which is somewhat muffled by the main fluid
coupling oil surrounding these gears.
b. Rear Unit
The rear unit planetary gears may cause a
whine in Park and Neutral, first and second speeds
in any forward driving range, and in reverse dur-
ing deceleration.
c. Reverse Unit
The reverse unit planetary gears will cause a
whine during reverse acceleration only. Due to
limited use of reverse, the acceptable noise level
for these gears is higher than for the other two
gearsets.
NOTE: If a planetary gearset is unaccept-
able due to noise, entire gearset must be re-
placed as a unit to avoid worn gears causing
same characteristics in new gears.
d. Oil Pump
The oil pump may produce a whine at any time
the engine is running, especially during 1-2 and
3-4 upshifts when hot. This is distinguishable
from gear noise because it remains through all
gear ratios and noise will change with engine but
not car speed.
7. Linkage Adjustment
a. Manual Linkage
1. Remove slush deflector.
2. Remove clevis from manual lever on trans-
mission, Fig. 6-11.
3. Loosen lock nut on transmission manual rod.
4. Place manual lever on transmission in Dr-4
Position.
5. Place selector lever on steering column in
Dr-4 position against stop.
6. Adjust length of manual rod until hole in
Occurs Under Following Conditions
1. Gear noise in Dr-4, Dr-3, Lo, R - reverse, first
and third speeds.
2. Gear noise in P, N, Dr-4, Dr-3, Lo, R - neutral,
reverse coast, first, and second speeds.
3. Gear noise in R - reverse acceleration.
4. Buzz or whine at upshifts or low speed in any
gear.
5. Whine or whistle any time car is in motion.
6. Rattle or buzz under light load in 3rd and 4th
speeds.
7. Squawk when engaging Reverse.
8. Vibration at certain engine speeds.
Possible Cause
Front Unit Planetary Gears
Rear Unit Planetary Gears
Reverse Planetary Gears
Oil Level Low
Oil Pump
Cooler Pipes Grounded
Intake Pipe " 0 " Rings Leaking
Governor Drive Gears
Torus Cover - Dampener Spring
Reverse Gearset Rattling
Low Oil Pressure - Internal Leak
Flywheel - Balance
Torus Cover - Balance
Flex Plate - Runout
Fig. 6-10 Noise Diagnosis Chart