700R4 lock-up in 68
 

How did ya'll hook up your lock mechanism in your tranny without having the proper wiring harness?

Re: 700R4 lock-up in 68
 

http://bowtieoverdrives.com/index.shtml

I used the TV made EZ cable and their TC lock-up kit. A little over 1 year and over 5K miles later my tranny still shifts great.

Re: 700R4 lock-up in 68
 

I use the TPI computer to control my lock up.

But, if you look at the wiring diagrams and do a little reseach you should be able to hook up your own lockup switch yourself. If I remember right, its a 5V signal to the tranny. you could just wire it up so that on the highway you flip the switch and it locks up, otherwise run it unlocked. But it wouldn't really be integrated and as convienent.

Re: 700R4 lock-up in 68
 

what is the pros and cons about running locked and unlocked trans??

Re: 700R4 lock-up in 68
 

Re: 700R4 lock-up in 68
 

A buddy of mine who runs a tranny shop just puts it on a dimmer switch a little higher up than the stock dimmer and uses that for the lockup

Re: 700R4 lock-up in 68
 

I did this in my '84 Camaro when I took out the computer. All that I did was run an ignition only power wire to the tranny. All GM parts, using the specified p/n's. It works great, and only locks up in 4th gear.

Re: 700R4 lock-up in 68
 

I did this in a 67 chevelle. Here goes. the 4 wire connector in the trans is lettered a,b,c,d. The purple wire in the connector you get at the local boneyard is " A"
I ran "A" to a toggle switch, and THEN thru a 4 pin brake light switch out of a 78 corvette with cruise. the tcc lock up was wired thru the cruise " on off " part of the brake light switch.

SO if you were cruising slowly and did not want the TCC to lock up, TURN THE TOGGLE SWITCH OFF. If you are cruising on 45-55 + TURN THE SWITCH ON.

this way you have the best of everything. TCC lock up when you want it.
I intend to do this to my NEW 69 chevy short bed soon.

Re: 700R4 lock-up in 68
 

here's a wiring diagram of a lockup. If you have a trans older than 85 it will burn up if you don't run it in lockup.
http://www.smokemup.com/tech/700r4.php

Re: 700R4 lock-up in 68
 

locked converter helps keep trans temp down, plus it will let you run a stall thats higher than your normal highway rpm.

Re: 700R4 lock-up in 68
 

When I had the 700R4 rebuilt for the second time, I had the guy run mine hydraulically. It just goes into lockup at 35mph, all the time. I don't know how its done, but thats what he said he did. Prior to that, I ran it like cparman had his, just hot all the time. May have been why I had to rebuild the tranny more than once...:lol:

Re: 700R4 lock-up in 68
 

Thank ya'll for all the inputs...and guys that are using the toggle switch...do you ever get annoyed or wish it was automatic? And using a dimmer switch is a good idea.

Re: 700R4 lock-up in 68
 

Use this....works great......might consider putting it into the FAQ to help others

Re: 700R4 lock-up in 68
 

I got a B&M lockup kit from Jeg's that goes in line with the speedo cable and has a little box with a dimmer style knob that allows you to adjust at what speed/point the lockup comes on.

Re: 700R4 lock-up in 68
 

Oh now that's cool...

Re: 700R4 lock-up in 68
 

i have a 96 pickup with a 04l60e trans, this trans doesn't lock up until the oil reaches a certain temperature. Why is that and why isn't it mentioned anywhere when converting to a 700r4 with a lockup system.

Re: 700R4 lock-up in 68
 

Never heard that one before. Guess it's possible with the newer trans though.

Re: 700R4 lock-up in 68
 

with the 4L60's past '92, i think, the shift points are controlled by the computer. whereas before that time it was controlled hydraulically. it's probably attributed to that

we're mainly talking about putting a non computerized 700R4 into these trucks.

Re: 700R4 lock-up in 68
 

Ah of course, I could have thought of that by my self.
But it could be possible to put a an adjustable temp switch in the circuit, if it would be better.