B&M 70248 CONVERTER LOCKUP CNTRL - Manual (Page 3)

ommend that you wire the Converter
Lock-Up Control through the brake
switch as a safety precaution. The
brake switch disengages the lock-up
clutch upon brake application in the
unlikely event of an electrical malfunc-
tion. Route wires next to members
where they can be secured. Once
again remember to avoid mechanisms
and hot pipes which can fray or melt
the insulation and cause a short cir-
cuit.
OPERATION
Operation of your B&M Converter
Lock-Up Control is automatic once it
has been preset to the desired lock-up
speed and the power button has been
engaged. When properly connected
the Red LED on the front of the Con-
verter Lock-Up Control should light
when the ignition key is turned on (if it
does not, please recheck the Red &
Black wires). Lock-up engagement
speed is adjusted while operating the
vehicle. Operate the vehicle at the
speed where you want the lock-up to
be engaged continuously. With the
power button engaged, turn the knob
until the Green LED lights and the
converter clutch lock-up occurs. The
lock-up engagement speed can be
changed at any time to suit driving
conditions by turning the knob left or
right as desired.
CUSTOM TRANSMISSION
INSTALLATION
B&M’s Converter Lock-Up Control
is especially suited for controlling the
lock-up clutch in vehicles with custom
transmission installations which were
not originally manufactured with a
torque converter clutch equipped
transmission.
Custom transmission installations uti-
lizing early model transmissions with
valve body controlled lock-up (TH-
200-4R, TH-700-R4) speed may re-
quire some modification to operate
3
correctly. In these cases consult the
appropriate factory service manual to
locate the converter clutch shift valve
train in the valve body. Deactivate the
converter clutch shift valve by remov-
ing the spring holding the valve train in
the OFF position. This will allow the
converter clutch shift valve to move to
the ON position and ensure that con-
trol pressure is always available at the
converter clutch apply valve after the
first gear shift. A TH-700 converter
clutch shift valve train is shown in
Figure 3 as an example. It may also
Figure 3
Connect Black (thin) wire
to lead going to Upper pin
Connect Red (thin) wire to
lead going to Lower pin
Transmission mounted
speed sensor
If speedometer fails to indicate speed when vehicle is
moved, then reverse connection of Black and Red wires
Figure 2
Remove spring if
present
TH-700-R4 valve body TCC valve train
NOTE: TCC valve train and bore are not
present beginning 1989 model year
ECU controlled TCC
have these