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:Thiskitisdesignedfor transmissionsequippedwithamechanicallydriven 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 providesdrivercontrolofthespeedwhere 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 receivesasignalfromthesuppliedspeedometercablemountedsensor.Thissignalalongwiththedialsettingdetermines 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 clutchoff).Whenthevehiclereachesthe speed preset by the dial on the Converter Lock-Up Control module, the LEDturnsGREENandpowerisavailable to the lock-up clutch solenoid. This will
activatethesolenoidandcausetheconverter clutch to lock-up. Once the transmission has shifted beyond first gear and thesolenoidisactivated,lock-upwilloccur atanyspeedwithintherangeoftheLockUp Control. B&M’s Converter Lock-Up Controlwillnotcureadefectiveconverter clutch,howeveriftheclutchisnotdefective theB&MConverterLock-UpControlwill 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 higherthan45MPH.Operationinfourth gear (Overdrive) without the converter clutch locked-up can result in transmissionandengineoverheating.
PREINSTALLATION
Before installing your B&M Converter Lock-Up Control we recommend that you perform a few simple transmission performancechecksandmakesureyou have certain tools and equipment on hand to assist in the installation.
LOCK-UPCLUTCHOPERATION
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(instockvehicles)canusually becheckedbyoperatingthevehicleata steadyspeedandlightlydepressingthe brake pedal just enough to activate the brakelightswitch.Alternatively,depress the throttle a small amount but rapidly, this should cause the lock-up clutch to disengage,thenrapidlyreturnthrottleto steadyspeedpositionandlock-upclutch shouldreengage.Whenthelock-upclutch engages and disengages you should notice a 200-500 RPM change in engine speed. If the lock-up clutch is defective replacethetorqueconverter.
TRANSMISSIONPERFORMANCE
Checkoveralltransmissionperformance forshiftqualityandtiming.Ifperformance seems sluggish or shift timing is occurringtooearlyorlatecheckvacuumlines andtransmissionthrottlevalveordetent cable adjustment. Check transmission oil pressures and compare them to the appropriate service manual for your vehicle. If the problems persist B&Mhas 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
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supplied |
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connector |
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TCC & Brake |
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Transmission |
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Yellow |
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Slide switch in |
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light switch |
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this direction |
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Yellow |
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Black |
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Ringterminal |
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Red |
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(ground) |
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Switched 12 volts |
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Black |
Chassisground |
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Red(thin) |
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8 Pulse/Rev. |
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Speedometer cable |
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Black (thin) |
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mounted speed sensor |
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Figure 1
INSTALLATION
InstallationofB&M’sConverterLockUp 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 RIGIDLYANDSECURELYSUPPORTED, JACK STANDS, WHEEL RAMPS OR A HOIST WORKS BEST, DO NOT USE JACKS ALONE.
WIRINGREQUIREMENT
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:
COLOR |
FUNCTION |
Red |
+12V, 5A-10A fused, |
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ignition key controlled |
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source. |
Black |
Chassis ground. |
Yellow |
Supplies +12V to |
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transmission lock-up |
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clutch solenoid. |
Red (thin) Speed sensor. Black (thin) Speed sensor.
Installationofthe B&MConverterLockUp Control requires hooking up only the
Red, Blackand Yellow wires, the Black (thin) and Red (thin) wires are already connected to the speed sensor unit.
STANDARDINSTALLATION
STEP 1. Choose an accessible location on the dash to mount the Converter Lock-Up Control module. Using rubbing alcohol, clean the surface. Remove the backing from the hook & loop tapes and install on the Converter Lock-Up Control module & dash.
STEP 2. Locateignitionkeycontrolled 5A-10A fused source of +12V and a goodchassisgroundconnection.Most GM fuse panels have an instrument section that can be tapped to supply theConverterLock-UpControlmod- ule. Use a VOM (Volt-Ohm Meter) or a test light to check the continuity and voltage between the proposed power source and ground.
STEP 3. Connectthe Redwireto+12V power source and the Black wire to ground connection located in STEP 2. Reversingthepolarityofthesetwowires will damage the Converter Lock-Up Control module and VOID THE WARRANTY. Route wires so they cannot become tangled in any mechanisms (brake pedals, A\C, heater controls).
STEP 4. Route remaining wires from the ConverterLock-UpControl module 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 insulationfromwiresandtheignitionpulses 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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