Ford THUNDERBIRD 1960 - 5-3 Overdrive Trans.

OVERDRIVE
TRANSMISSION
Section
1 Trouble Shooting .
2 Operation
3 Overhaul
Cl 145-A
When trouble occurs in the
over
drive unit, check the mechanical op
eration
of the unit
before checking
the operation of the overdrive elec
trical control system.
MECHANICAL CHECKS
OVERDRIVE CONTROL HANDLE
CLEARANCE CHECK
Check for the specified clearance
between the overdrive control handle
shank and the support bracket on the
instrument panel.
OVERDRIVE CONTROL LEVER
POSITION CHECK
Raise
the
car and check the posi
tion of the overdrive control
lever at
the overdrive unit housing. The lever
should rest firmly against its stop at
the rear. If the
lever
is not all
the
way back, the overdrive shift rail
may
be locking the pawl and preventing it
from engaging the balk ring gear.
With the engine stopped and the
clutch
engaged, shift the
transmission
to third or second gear and shift the
overdrive control lever to the auto
matic rearward position, The drive
shaft should
then turn freely in a
clockwise direction when viewed
from the front, but should lock up
when turned
counterclockwise.
With
the
transmission
remaining in
third or second gear, shift the over
drive control lever to the locked-out
forward
position. The drive shaft
should
lock up when turned either
clockwise or counterclockwise.
PAWL ENGAGEMENT
CHECK
Check the mechanical engagement
of the
pawl with the balk ring gear,
using the following procedure:
1. Turn on the ignition switch, and
raise the car.
2.
Shift the overdrive control lever
to
the locked-out forward position,
and shift the transmission to neutral.
3.
Remove the cap from the over
drive
solenoid.
4. Turn
the
drive shaft clockwise
and,
at the same time, ground the
white governor wire with a jumper.
The solenoid will then become ener
gized, and
the solenoid stem should
move in about ¼ inch. The solenoid
plunger should move in about ½ inch.
5. Keep the solenoid energized,
and shift the transmission to third or
second
gear to lock the transmission
output shaft against rotation. Shift
the overdrive control lever to the
automatic rearward position.
6. Turn the drive shaft clockwise,
and watch the movement of the
sole
noid
stem. At less than ¼ turn of the
drive shaft, the solenoid stem should
move in about ¾ inch, indicating
that the pawl has engaged the balk
ring gear. This engagement will lock
the drive shaft
against rotation in
both directions.
If the pawl does not engage the
balk ring gear, replace
the solenoid
and repeat the test. If the pawl still
does not engage, remove the over-
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fl
TROUBLE SHOOTING
TO ‘ACC’ TERMINAL
OF
Block
FUSE
TO COIL TERMINAL
OF IGNITION SWITCH
/
PEDAL
#18 Red-
White Bond
#18
White
DISTRIBUTOR
IGNITION COIL
FIG, i-Overdrive Elecfrical Confrol System
OvERDRIvE
SOLENOID