Hudson 1948 - 1952, Service Manual

Page: 233 / 333

OVERDRIVE 9 - 25
4. Connect test lamp between test harness leads No. 1 and
No. 4. Disconnect overdrive black wire at solenoid termi-
nal No. 4. Lamp should light only when this black wire
is grounded.
5. Connect test lamp between test harness leads No. 1 and
No. 2. Lamp should light when kickdown switch plug
socket No. 4 is grounded but not before. To ground this
plug socket use a second test harness or a suitable jumper
wire.
6. Connect test harness to kickdown switch harness plug but
not to kickdown switch put transmission in neutral and
push overdrive control button "in". Connect test lamp
between negative battery terminal and No. 1 test harness
lead. Remove red overdrive wire at governor switch.
Lamp should light when the wire is grounded but not
before. If the harness does not meet this test the overdrive
control switch may be at fault. Disconnect the two wires
at the control switch, join them with a 153622 connector,
and repeat test.
7. Connect test lamp between negative battery terminal and
No. 2 test harness lead. Also connect a jumper wire to
negative battery terminal. Touch other end of jumper
wire to 10-32 terminal of starter solenoid. Lamp should
flash on and off in time with distributor contacts.
8. Connect test lamp between negative battery terminal and
test harness lead No. 3. Lamp should light only when
overdrive green wire from solenoid terminal No. 6 is
grounded.
TROUBLE SHOOTING
MECHANICAL CONDITION NO. 1
DASH CONTROL IMPROPERLY CONNECTED:
A. Unless the overdrive dash control wire is connected to
the control lever on the left side of the overdrive housing
in such a manner as to move the lever all the way back
when the dash control knob is pushed
in, the lockup switch may be held open, thus disabling
electrical control operation. Likewise, it may hold the shift
rail in such a position as to interlock the pawl against full
engagement, even though the control switch is not held
open, resulting in a buzzing noise when overdrive engage-
ment is attempted.
B. To correctly make this connection, loosen binding post at
lever, pull dash control knob out 3/64", move lever all the
way to the rear, and tighten binding post.
CONDITION NO. 2
TRANSMISSION AND OVERDRIVE IMPROPERLY
ALIGNED:
A. The same symptoms as above may also result from mis-
alignment at assembly of the overdrive housing to the
transmission case, resulting in binding of the overdrive
shift rail, so that the retractor spring cannot move the rail
fully forward, when the dash control knob is pushed in,
and the transmission is not in reverse. Under such condi-
tions, the unit may remain fully locked up.
B. To test for this, be sure that the transmission is not in
reverse; disconnect the dash control wire from the lockup
lever, and feel the lever for free forward movement. If the
lever can be moved forward more than 1/4 inch, it indi-
cates that misalignment probably exists. To correct this,
loosen the 4 cap screws holding the overdrive housing to
the transmission; remove the lower right hand screw com-
pletely and insert J-4149 Aligning Pilot or any short .375"
diameter rod. Tighten the 3 cap screws to 20-30 foot
pounds torque. Remove pilot and similarly tighten 4th cap
screw. To check shift rail alignment compare loads on
overdrive control le v e r with transmission in reverse and
with transmission not in reverse.
NOTE: With transmission in reverse overdrive control lever
will move forward under a pull of less than 1 oz. When
transmission is not in reverse pull required should be
about 5 lbs.