Thread: 700R4 Trans

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Hi all. Have a 700R4 Trans behind a 350/330/SBC crate motor, New in a '46 ford - fired it for the first time and drove it up and down the block once. The trans wouldn't shift out of first gear. The engine was hotwired from the Battery to the coil but no wiring to the trans. Would this cause it not to shift? Thanks for an answer to a dumb question. Charlyg

later 700's were computer controlled and needed speedo hook-up to shift....is your's late or early model?

Out of an '86 Camaro. Tha nks for the reply.

700/R4s of that vintage don't need wiring. If it won't shift, don't drive it until you find out the problem. You can cook an R4 in a New York minute.

Do you have the TV cable adjusted correctly?

Could be a governor problem. Read this:

http://www.coloradok5.com/forums/pri...=142416&pp=100

Sounds like a TV cable problem...

i have installed a 350 h0 in my 1984 k10 i have a 700r trany it wont down shift

[QUOTE=mtburns63]i have installed a 350 h0 in my 1984 k10 i have a 700r trany it wont down shift[when the accelarator is depessed to the floor/QUOTE]

Usually it's the TV cable adjustment. Not only won't it downshift the cable is incorrectly adjusted, it will fry the trans. The only real way to adjust a 700R4 is with a pressure gauge.

[QUOTE=Henry Rifle]700/R4s of that vintage don't need wiring. If it won't shift, don't drive it until you find out the problem. You can cook an R4 in a New York minute.

Do you have the TV cable adjusted correctly?

Could be a governor problem.

what is the tv cable

That is what some folks call the kick-down cable. It goes from the carb to the trans. It has to be very carefully adjusted. It controls almost all of the pressures in the trans, and controls the shifts.

If you have to ask what it is, you probably can't pick up enough info on this forum to adjust it correctly, and it's too complex for me to walk you through it. Maybe someone else on here can. I know how to adjust the TV cable on my '34 coupe, but I can't give specific advice on your vehicle.

Thanks henry. Re-adjusted the TV cable and got the trans to shift by kicking it in the ass. But it's not right yet. I will check the "kick-down cable?" How and where do i find and learn to use a pressure gauge? Thanks again.

Originally Posted by Charlyg

Thanks henry. Re-adjusted the TV cable and got the trans to shift by kicking it in the ass. But it's not right yet. I will check the "kick-down cable?" How and where do i find and learn to use a pressure gauge? Thanks again.

Just google 700R4 TV cable,you will get tons of info and pics.EZ

Originally Posted by mtburns63

what is the tv cable

This site might help. Good luck.


http://700r4.com/faq/whattv.shtml

David

There is no separate "kick down cable." That's what some folks mistakenly call the TV cable. Here's what the TV cable does:

The TV cable used with the 700R4 transmission should not be thought of an automatic downshift cable. The TV cable used on the 700R4 controls line pressure, shift points, shift feel, part throttle downshifts and the detent downshifts.

Read this: http://www.tvmadeez.com/article/index.php It's long, and may take a couple of reads, but it's very informative.

I used a 300 psig gauge/hose setup like the one in the photo below. There's a pressure port on the left side of the transmission that takes a 1/8" NPT fitting.

After making sure that the linkage was adjusted so that the cable was pulled all the way out at WOT, I went back and set the at-idle position as follows:

With the car in park, and at idle, warm engine, warm trans, I tightened the cable to make sure the pressure rose. Then, I loosened it until the pressure stopped dropping. Finally, I tightened it again until a got a 3-5 psig increase.

This file has the set-up instructions for a Street Demon carb, but the ideas are pretty universal:

http://www.members.cox.net/john.e.cox/sdemon.pdf