How do u wire a 700r4 with a computer

Look at Post#5 in this thread will help. >> http://www.hotrodders.com/forum/200-4r-application-163049.html
Usually 12Volts to Pin A will operate the Lockup Clutch in the Torque Converter.
More Info >> http://www.73-87.com/7387garage/drivetrain/lockup.htm
http://www.smokemup.com/tech/700r4.php
http://www.rowand.net/Shop/Tech/AutomaticOverdriveTransmissionSwap.htm

saskroughriders said:

I just put a 350 and a 700 overdrive into my truck how do a wire the torque converter into my truck i cant seem to find a wirin diagram

Click to expand...

You could start by telling us what year truck and what engine and trans were in it originally.

its a 1987 700r4 and the engine is anywhere from 88 to 92 im not sure cuz it wasnt original in my parts truck

saskroughriders said:

its a 1987 700r4 and the engine is anywhere from 88 to 92 im not sure cuz it wasnt original in my parts truck

Click to expand...

Sorry if I'm dense here, but I'm not asking about the new 700R4. I'm asking about the truck (and computer) that it's going into. What engine and trans was that computer set up to operate originally?

o haha sorry the computer should be an 87 for the fuel injected 350

The 1987 computer and wiring harness should already have a four pin plug for the transmission lockup function. This should be a four pin square plug (terminals oriented 2x2) and may or may not use all four pins. Of course, the computer requires that you also use the TBI and sensors from the original truck to know when to lock up the converter. If you are not planning to do that, you will need to either use an aftermarket lockup kit or a toggle switch.

sorry im a little dense TBI? wats thta stand for?

is that the clear plastic t shaped thing with a spring in it?

saitek5678

Hey! how ya doin? The wiring has to "jive with your stuff", Trans, ECM, engine, sensors need to "hook up". they may not be compatible. In other words just because they bolt up may not mean it will work. Take all the **** off the old engine and put it on the new, or maybe a different wiring harness or ecm, if it doesn't all plug in.......Your ****ed

Tbi is throttle body injection. It came after the carb. and functions almost exactly like one, but electronic.

thamks everyone and i think all that should hook up because its all comin out of a parts truck which ran before i took everythin out lol this is my first engine / transmision swap and all ur help is appreciated im proud of bein like the only kid in my town who doesnt drive a cavalier civic etc. :thumbup:

o and tbi is just another name for the injectors then lol got it

saskroughriders said:

o and tbi is just another name for the injectors then lol got it

Click to expand...

Well, specifically, TBI (throttle body injection) mounts the injectors and sensors in a throttle body located in the same general place as a carb. This is different from port injection, where there is an individual injector for each cylinder. The 87 trucks used TBI and the computer will be expecting to get inputs from the sensors associated with the TBI unit. These sensors (vehicle speed sensor, throttle position sensor, manifold air pressure sensor, coolant temp sensor) are used to determine when to lock and unlock the torque converter. If you are not using the TBI system and associated sensors, the computer won't be able to control the trans.

o ok .. and yes were usin the TBI and the computer will accept cuz both r out of my parts truck

the engine computer and trans r all from my parts truck