B&M 70244 CONVERTER LOCKUP CNTRL - Manual

NOTE: This kit is designed for transmis-
sions equipped with a mechanically driven
speedometer cable. Use kit P/N 70248
with transmissions equipped with elec-
tronic speed sensor.
INTRODUCTION
Please read the instruction sheet thor-
oughly before attempting to install your
B&M Converter Lock-Up Control.
B&M’s Converter Lock-Up Control
provides driver control of the speed where
converter clutch lock-up takes place.
This dash mounted electronic control
module has a dial to adjust lock-up
speed, a two color LED (Light Emitting
Diode) that indicates the lock-up clutch
status and a power on/off button. The
Converter Lock-Up Control module
receives a signal from the supplied speed-
ometer cable mounted sensor. This sig-
nal along with the dial setting determines
the precise speed at which to activate
the lock-up clutch solenoid. Whenever
the ignition is on and power button is
engaged but the vehicle is stopped or
moving slowly the LED is RED (lock-up
clutch off). When the vehicle reaches the
speed preset by the dial on the Con-
verter Lock-Up Control module, the
LED turns GREEN and power is available
to the lock-up clutch solenoid. This will
activate the solenoid and cause the con-
verter clutch to lock-up. Once the trans-
mission has shifted beyond first gear and
the solenoid is activated, lock-up will occur
at any speed within the range of the Lock-
Up Control. B&M’s Converter Lock-Up
Control will not cure a defective converter
clutch, however if the clutch is not defective
the B&M Converter Lock-Up Control will
lock it at the preset speed.
WARNING: When using B&M’s Con-
verter Lock-Up Control with any four
speed overdrive transmission, we rec-
ommend that lock-up speed not be set
higher than 45 MPH. Operation in fourth
gear (Overdrive) without the converter
clutch locked-up can result in transmis-
sion and engine overheating.
PREINSTALLATION
Before installing your B&M Converter
Lock-Up Control we recommend that
you perform a few simple transmission
performance checks and make sure you
have certain tools and equipment on
hand to assist in the installation.
LOCK-UP CLUTCH OPERATION
Operate vehicle with range selector in
third gear (Drive) position. Choose an
area where you will not exceed the local
speed limit. Verify proper operation of
lock-up clutch and transmission. Accel-
erate the vehicle at low speed until it
shifts into third gear. Lock-up clutch
operation (in stock vehicles) can usually
be checked by operating the vehicle at a
steady speed and lightly depressing the
brake pedal just enough to activate the
brake light switch. Alternatively, depress
the throttle a small amount but rapidly,
this should cause the lock-up clutch to
disengage, then rapidly return throttle to
steady speed position and lock-up clutch
should reengage. When the lock-up clutch
engages and disengages you should no-
tice a 200-500 RPM change in engine
speed. If the lock-up clutch is defective
replace the torque converter.
TRANSMISSION PERFORMANCE
Check overall transmission performance
for shift quality and timing. If performance
seems sluggish or shift timing is occur-
ring too early or late check vacuum lines
and transmission throttle valve or detent
cable adjustment. Check transmission
oil pressures and compare them to the
appropriate service manual for your ve-
hicle. If the problems persist B&M has a
complete line of products for rebuilding
and enhancing the performance of
General Motors Transmissions.
9500475-08 Printed in the U.S.A. Not legal for sale or use on pollution controlled motor vehicles.
I
nstallation Instructions
Converter Lock-Up Control
TH700-R4/4L60, 200C, 200-4R, 350C
Part Number 70244
© 2008, 2007 & 2001 by B&M Racing and Performance Products