Ford THUNDERBIRD 1960 - Page 145

5-14
GROUP 5-CLUTCH AND MANUAL-SHIFT TRANSMISSIONS
drive unit from the car for inspection
and repair.
ELECTRICAL
CHECKS
GOVERNOR CIRCUIT
CHECK
1. Turn the ignition switch on and
off, and
listen
for
the
relay or sole
noid to click. If either
clicks as soon
as the ignition switch is turned on,
the governor circuit Fig. 1 is
grounded
or
the relay is defective.
2. To determine which condition
is present, remove the wire from the
TH-SW terminal or the relay and
turn on the ignition switch. If the
relay clicks, the relay is
defective. If
it does not click, the
governor circuit
is grounded.
3. To check the governor opera
tion when
the
relay
does
not click as
the ignition switch is turned on, dis
connect the wire
at
the TB-SW ter
minal.
4. Raise
the rear
wheels off the
floor.
5. Connect a test lamp between the
battery and the wire removed from
the TH-SW terminal.
6. Start the engine and, with the
transmission
in third,
bring the speed
ometer
reading up
through
28 mph.
The lamp should light at or about
this speed.
7, Throttle
the
engine down
through
22 mph and at
or about
this
speed
the lamp should go out. If the
lamp lights and goes out at or about
these speeds,
the
governor and gov
ernor circuit
are
working
properly.
If the
lamp does not light at any time,
replace the wire at the TB-Sw ter
minal.
8.
Turn the ignition switch on and
raise
the car. Disconnect the yellow
wire from the white wire at the con
nector.
9,
Ground the white wire on the
transmission case. If the relay and
solenoid click, the governor circuit is
working properly
from the
TB-SW
terminal to the connector Fig. 1,
and the trouble is in the yellow wire
or
the governor. If the relay and sole
noid do not click
when the
white wire
is
grounded,
the trouble
is between
the
TM-SW terminal and the con
nector Fig. 1.
SOLENOID CIRCUIT
CHECK
1. With the engine stopped and
the ignition switch on, ground the
TM-SW
terminal on the relay. If the
relay and solenoid click as the ground
is made and broken, the solenoid cir
cuit is working properly. If the relay
does not click as the TM-SW terminal
is grounded, check the relay ION
terminal with
a test lamp.
2. With
the ignition switch on, thc
test lamp should light when it is con
nected between the IGN terminal on
the relay
and at a ground. If it does
not, the trouble is between the igni
tion switch and the ION terminal.
3. Connect
the test lamp at the
other
end of the fuse and at a
ground.
If the lamp lighted at the
ION end and not at the other, re
place the fuse. Sometimes the fuse
will "open" under
the
fuse end caps
where the "open" cannot be seen.
4. With
current at both ends of
the fuse, connect the
test
lamp be
tween the solenoid terminal and at
a ground.
Ground the TM-SW ter
minal. The
lamp should light. If it
does not, replace
the relay.
5. With
the relay
working prop
erly, the
solenoid should click when
the TH-SW terminal is grounded. If
it does not, connect
a
jumper from
the
SOLENOID terminal to the short
blue wire
separated from its connec
tor near the
solenoid. If
the solenoid
doesn’t click
when the relay closes
with the
jumper wire connected, re
place the solenoid. If it does click,
replace the wire from the SOLE
NOID relay terminal to the connec
tor.
INTERRUPTER CIRCUIT CHECK
If the interruptor circuit does not
ground the engine ignition momen
tarily when the driver depresses the
accelerator pedal
to the floor,
the
overdrive unit cannot shift from over
drive to direct.
1. The first check of the ignition
interruptor circuit is at the ignition
coil. The white wire with a red band,
which runs from the ignition coil to
the kickdown switch, must
be
con
neCted to the DIST terminal on the
coil. Sometimes this wire is improp
erly connected to the BAT terminal
during ignition work.
2. Rnisc thc car and pull the blue
wire with an orange band Fig. 1
from its connector near the solenoid,
and ground it to the
transmission
case
with
a jumper.
3. With the engine running at fast
idle, push the kickdown
switch
stem
down until it bottoms.
When the stem
bottoms, the engine should stop. If it
doesn’t stop, the circuit is open be
tween the DIST terminal
and
the
connector.
4. To check the ignition ground
ing
contacts inside the
solenoid,
dis
connect the jumper
and remove
the
solenoid from
the overdrive unit.
5. Attach the solenoid to the
adapter so that the stem
can extend
fully when the
solenoid is energized.
6. Connect both solenoid wires at
their
connectors.
7. Ground the governor
wire with
a jumper.
8. With the engine running at fast
idle, press down on
the kickdown
switch stem until
it bottoms. The en
gine should stop. If it doesn’t, replace
the solenoid.
U
OPERATION
The overdrive transmission
Fig.
2 consists of a
3-speed transmission
with
an
electrically-controlled
2-
speed overdrive
unit attached
to an
adapter
on the rear
end of the trans
mission case.
MECHANICAL OPERATION
DIRECT, FREE-WHEELING DRIVE
When the control handle is pushed
in, the
drive
through the
overdrive
unit from start to speeds at about 28
mph is direct 1.0:1 and free
wheeling.
The
power flow is from the trans
mission output shaft, through the
overrunning clutch free-wheel unit
to
the overdrive
main shaft Fig. 3.
This drive is said
to be
free-wheel
ing,
because
the overrunning clutch
permits the transmission output shaft
to drive the overdrive main shaft,
but it does not permit the drive to
reverse.
The driving action of
the
clutch
rollers while the transmission output
shaft is driving the overdrive main
shaft is shown in Fig. 4. The clutch
cam rotation
has moved the rollers
higher on the
cam surfaces and
wedged them against the outer race.
This permits the cam, which is splined