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700R4 guys, torque converter lockup control?

sled_dog

sled_dog

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What do you guys do about torque converter lockup when using a 700R4 behind a carb motor? Namely my truggy won't have any computer right off the bat. I might install TPI but initially it will be carb and I would rather have my efi standalone and not working my trans. So what do you guys do about torque converter lock up control? A friend of mine had a switch on his dash from an aftermarket control setup someone had installed when the transmission was rebuilt.
 
sled_dog said:
What do you guys do about torque converter lockup when using a 700R4 behind a carb motor? Namely my truggy won't have any computer right off the bat. I might install TPI but initially it will be carb and I would rather have my efi standalone and not working my trans. So what do you guys do about torque converter lock up control? A friend of mine had a switch on his dash from an aftermarket control setup someone had installed when the transmission was rebuilt.
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there's a conversion wiring harness you can buy from Summit

part # PRF-60109

http://store.summitracing.com/default.asp?Ntt=700r4&Ntk=KeywordSearch&DDS=1&searchinresults=false&N=0&target=egnsearch.asp&x=13&y=13
 
Just get one off of an "early" 700R4 truck. Already standalone, pretty darn common, and work good.

I'm not sure that they didn't use that setup until 1991 in "our" body style.
 
you can pickup a kit from bowtie overdrives, thats what I used when I rebuilt my 700r4, automatic lockup in 4th gear and it comes with a little switch for manual lockup in 2nd and 3rd gear, cost me about 75 bucks for the kit and includes everything.

Heres a link, I put this in mine and its been working great!

http://www.bowtieoverdrives.com/catalog/catalog_inc/viewitem.php?ITEMID=336

some fool before me cut out my lockup wiring from the transmission, just snipped the wires off at the TCC and pulled all the wires out! :confused:

No wonder the transmission didn't have 3rd and 4th gear when I bought the truck.
 
im not to sure how mine is all set up, but i just flip a switch and it will lock up.. i can do it any gear, but just mainly for the hi-way..

:confused:
 
thanks guys. I'm not even sure the trans I am using needs this stuff(it may well be an older one) but its 300 miles away so I can't just go pop in and check. I want to know what I would need if I have the need...
 
I wish I could be more specific, but when I got my 700r4 rebuilt about ten years ago, I seem to recall the tranny guy mentioning they installed a "cheater" lockup that didn't require any wires. FWIW, mine only locks up in 3rd as far as I can tell.

Maybe someone could shed some light on this?
 
CanmoreK5 said:
I wish I could be more specific, but when I got my 700r4 rebuilt about ten years ago, I seem to recall the tranny guy mentioning they installed a "cheater" lockup that didn't require any wires. FWIW, mine only locks up in 3rd as far as I can tell.

Maybe someone could shed some light on this?
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I have talked to a couple of tranny shops and they say that they perform the lock-up mods internally so you dont need to have the add-on stuff. Never was told the specifics.

When my buddy changed from TBI to a carb in my 89 p/u he used a B&M kit that you could adjust to the specific mph for the lock-up.. Not a bad kit with a in cab controller, but it is a little pricey.
 
I have talked to a couple of tranny shops and they say that they perform the lock-up mods internally so you dont need to have the add-on stuff. Never was told the specifics.
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most of the time its just the 5/16" check ball
 
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