Ford THUNDERBIRD 1960 - 6-3 Troubleshooting

U
PRELIMINARY CHECKS
Section
Page
I Preliminary Checks 6-14
2 Performance Checks 6-15
3 Diagnosis Guide 6-17
The following preliminary checks
should be made on a Cruise-O-Matic
transmission before proceeding with
any other trouble-shooting checks.
TRANSMISSION FLUID
LEVEL CHECK
Check the transmission fluid level,
using the procedure given in Part
6-2. A low fluid level can affect the
operation of the transmission, and
may indicate fluid leaks that could
cause transmission damage.
A fluid level that is too high will
cause the fluid
to become aerated.
Aerated fluid will cause a low control
pressure and the aerated fluid may be
forced out the vent tube.
TRANSMISSION FLUID
LEAKAGE
CHECKS
Check the speedometer cable
con
nection
at
the transmission.
Replace
the rubber
seal if necessary.
Inspect the governor inspection
plate for leakage. Install a new gasket
if needed.
Leakage at the oil pan gasket often
can be stopped by tightening the at
taching bolts to not more than 10-13
foot-pounds torque. If necessary, re
place the gasket.
Check the fluid filler tube connec
tion at the transmission oil pan. If
leakage is evident here, tighten the
fitting.
Check the fluid lines and fittings
between the transmission and the
cooler in the radiator tank for loose
ness, wear, or damage. If leakage
cannot be stopped by tightening a
fitting, replace the leaking parts.
Check the engine coolant in the
radiator. If transmission fluid is pres
ent in the coolant, the cooler in the
radiator tank is probably leaking.
The cooler can be further checked
for leaks by disconnecting the lines
at the cooler fittings and applying 5
psi air pressure to the fittings. If the
cooler is leaking and will
not
hold
this pressure, the radiator
must be
replaced. The cooler cannot be re-
placed separately.
If
leakage is found at either
the
throttle lever
shaft or the
manual
lever shaft, replace the corresponding
seal.
Inspect the hexhead pipe plug on
the left side of the transmission case
at the front. If
the plug leaks, tighten
the plug to 7-15 foot-pounds torque.
If tightening does not stop the leak,
replace
the plug.
If the converter
drain plugs leak,
remove the plugs with
a
sixpoint
wrench. Coat the
threads
with Fo
MoCo Perfect Seal Sealing Com
pound or its equivalent, and install
the plugs. Tighten the drain plugs
to 15-28 foot-pounds torque. Fluid
leakage from the converter housing
may be caused by engine oil leaking
past the rear main bearing or from
oil gallery plugs. Be sure
to
deter
mine the exact cause of the leak.
Oil-soluble aniline or fluorescent
dyes premixed at the rate of
½
tea
spoon of dye powder to ½ pint of
transmission fluid have proved help
ful in locating the source
of the
fluid
leakage. Such
dyes may be used to
determine whether
an engine oil or
transmission fluid leak is present, or
if the fluid in the oil cooler leaks into
the engine coolant system. A black
light, however, must be used with the
fluorescent dye solution.
ENGINE IDLE SPEED CHECK
Check and, if necessary, adjust the
engine idle speed, using the proce
dure given
in Part 6-2.
If the idle speed is too low, the
engine will run rough. An idle speed
that is too high will cause the car to
crcep when the transmission is shift-
ed out of neutral.
ANTI-STALL DASHPOT
CLEARANCE
CHECK
After the engine idle speed has
been properly adjusted, check the
anti-stall dashpot clearance. Follow
the procedure given
in Part 6-2 for
checking and adjusting this clearance.
THROTTLE LINKAGE CHECK
When the engine has been properly
tuned and the idle speed and anti-
stall dashpot clearance adjustments
are correct, cheek the
throttle link
age.
Complete pressure adjustment
procedures are given in Part
6-2.
MANUAL LINKAGE
CHECKS
Correct manual linkage adjust
ment is necessary to position the man
ual valve for proper fluid pressure
direction to the different transmis
sion components.
Improperly ad
justed manual linkage may cause
cross-leakage and subsequent trans
mission failure. Refer to Part 6-2, for
detailed manual linkage adjustment
procedures.
STALL TEST
The stall test is made in D2, Dl,
or R at full throttle only to de
termine if the bands and clutches are
holding properly. While making this
test, do
not hold the throttle open
for more than five seconds at a time.
Connect a tachometer, and start
the engine to allow it to reach its
normal temperature. Apply both the
parking and service brakes,
Place the selector lever at D2, then
press the accelerator to the floor.
Note the engine speed. Stall speeds
are given in Table I.
Cruise-O-Matic will not downshift
in eithcr Dl or D2 when the car is
standing still and the accelerator
pedal is depressed through the detent.
In Dl car standing still, the
front clutch and the one-way clutch
are engaged at all accelerator pedal
positions.
In D2
car standing
still,
the
front clutch and front band are en
gaged at
all accelerator pedal posi
tions.
6-14
In L, the front clutch
and
rear
band are applied.