B&M CONVERTER LOCKUP CNTRL User Manual
Installation 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
NOTE: This kit is designed for transmissions equipped with a mechanically driven
speedometer cable. Use kit P/N 70248
with transmissions equipped with electronic speed sensor.
INTRODUCTION
Please read the instruction sheet thoroughly 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 speedometer cable mounted sensor. This signal 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 converter clutch to lock-up. Once the transmission has shifted beyond first gear and
the solenoid is activated, lock-up will occur
at any speed within the range of the LockUp 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 Converter Lock-Up Control with any four
speed overdrive transmission, we recommend 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 transmission 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. Accelerate 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 notice 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 occurring 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 vehicle. If the problems persist B&M has a
complete line of products for rebuilding
and enhancing the performance of
General Motors Transmissions.
Printed in the U.S.A.
Not legal for sale or use on pollution controlled motor vehicles.
9500475-08
70244 LOCKUP CONTROL
Slide switch in
this direction
Black
Black (thin)
INSTALLATION
Installation of B&M’s Converter LockUp Control requires clear access to
the underside of the vehicle in order to
properly route wires and install speed
sensor. Raise the vehicle so there is 2
feet or more ground clearance.
MAKE SURE THE VEHICLE IS RIGIDLY AND SECURELY SUPPORTED,
JACK STANDS, WHEEL RAMPS OR
A HOIST WORKS BEST, DO NOT
USE JACKS ALONE.
WIRING REQUIREMENT
The B&M Converter Lock-Up Control is relatively simple to hook up.
There are five wires connected to the
Converter Lock-Up Control module
which are color coded and have the
following functions:
Yellow
Red
Red (thin)
Figure 1
COLOR FUNCTION
Red +12V, 5A-10A fused,
ignition key controlled
source.
Black Chassis ground.
Yellow Supplies +12V to
transmission lock-up
clutch solenoid.
supplied
connector
TCC & Brake
light switch
Yellow
Black
Switched 12 volts
Chassis ground
mounted speed sensor
Transmission
Ring terminal
(ground)
8 Pulse/Rev.
Speedometer cable
Red (thin) Speed sensor.
Black (thin) Speed sensor.
Installation of the B&M Converter Lock-
Up Control requires hooking up only the
Red, Black and Yellow wires, the Black
(thin) and Red (thin) wires are already
connected to the speed sensor unit.
STANDARD INSTALLATION
STEP 1. Choose an accessible loca-
tion on the dash to mount the Converter Lock-Up Control module. Us-
ing rubbing alcohol, clean the surface.
Remove the backing from the hook &
loop tapes and install on the Con-
verter Lock-Up Control module &
dash.
STEP 2. Locate ignition key controlled
5A-10A fused source of +12V and a
good chassis ground connection. Most
GM fuse panels have an instrument
section that can be tapped to supply
the Converter Lock-Up Control mod-
ule. Use a VOM (Volt-Ohm Meter) or a
test light to check the continuity and
voltage between the proposed power
source and ground.
2
STEP 3. Connect the Red wire to +12V
power source and the Black wire to
ground connection located in STEP 2.
Reversing the polarity of these two wires
will damage the Converter Lock-Up
Control module and VOID THE WAR-
RANTY. Route wires so they cannot
become tangled in any mechanisms
(brake pedals, A\C, heater controls).
STEP 4. Route remaining wires from
the Converter Lock-Up Control mod-
ule to the transmission. Make sure
wires passing through the fire wall or
floor pan are adequately protected
against abrasion with the sheet metal.
Also take care not to route wires near
hot exhaust pipes and high tension
ignition wires. The heat will melt insulation from wires and the ignition pulses
can cause unpredictable Converter
Lock-Up Control operation.
STEP 5. Disconnect the speedometer
cable at the transmission end. Install
the short adapter cable supplied with
kit on the transmission making sure
cable core is engaged in transmission
fitting. Next install the speed sensor
and connect speedometer cable to the
other side. Rotate sensor so that wires
do not hang down and are out of the
way of any moving mechanism or hot
pipes.
STEP 6. For most applications connect the Yellow wire as shown in
Figure 1 which shows the proper wiring hookup for the Converter Lock-Up
Control. This diagram shows the stock
TCC (
Torque Converter Clutch) and
brake light switch with the yellow wire
feeding through the switch and continuing down to the ‘A’ terminal on the
connector going into the transmission.
For ease of convenience, the kit is
supplied with the yellow wire and a
black grounding wire attached to a
connector that will plug directly into the
transmission. This yellow wire can be
cut and routed to the brake light switch
and then continue to the Converter
Lock Up Control. The short black wire
can be attached to a transmission pan
bolt to ground the circuit. In custom
applications you can bypass the brake
light switch, and you can plug the
supplied transmission connector directly into the transmission and ground
the short Black wire from pin D. We
recommend that you wire the Con-
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