700R4 question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69&72Bowties · 07-01-2002, 01:00 PM

I just acquired a 700R4 out of a mid 80's van... It came with only the detent cable... I am planning on changing the fluid, filter and adding a shift kit to it and buying a new converter.

How do you wire up the valve body to lock up the converter? It seems like I read somewhere that you wire the solenoids up a certain way to run off of one 12v wire?

If so does anyone know how or where to get the directions for this?

Thanks,
Bryan

Low69CST · 07-01-2002, 01:23 PM

There are several kits available to make the converter lock up. The Painless wiring kit has a pressure sensor that locks up the converter. B&M and Ron Francis have a speed sensor that locks it up. I only know of people using the speed sensor. You mount an adjuster in your cab and you adjust the speed that the converter will lock and unlock at. Usually about 45, depends on your gearing.

69&72Bowties · 07-01-2002, 02:54 PM

I really dont know if I want something in the cab that controls the lock up.. I think I would rather just have the pressure sensor to control it all..

I will check out the painless wire kit...

Longhorn Man · 07-01-2002, 08:07 PM

Don't forget to get a TV cable.
Once you have it all put together, I would go to a large tranny shop, and have them put the oil pressure guages on it to ensure the cable adjustment is perfect.
These trannys are very picky, and self destruct with little to no notice when the cable is misadjusted.

my new 72 · 07-01-2002, 08:13 PM

Hey check out my post on torque convertors. Bigvinnie put a link on there to a site that has a switch that integrates your brake switch to turn the convertor off. I am sure they have an automatic switch to turn it on too.

Blue68 · 07-01-2002, 11:36 PM

Since you will have it apart, talk to the guys at 700r4.com. They can provide you with directions so that you set up your TV cable correctly. When you have the pan off, it is fairly easy.

I use the Painless wiring kit and a vacuum pressure sensor and a brake switch (replaces the existing one). It will only lock up in overdrive when there is sufficient vacuum (engine not under significant load) and unlocks when the brakes are applied.

I'm thinking there should be a relay in the circuit though to offload some of the amps on the ignition system.

Gordo · 07-02-2002, 02:20 PM

You also have the option of going with a non-lockup converter. This is the route I went and 40K later, I have no complaints. I prefer to keep things simple.

69&72Bowties · 07-02-2002, 04:44 PM

I will keep thinking and digging on this issue...

I will be running 3.08 gears at first so I will have to wait and see, will probably go up to a 3.55 gear soon....

Thanks for all your help...

07-01-2002, 01:00 PM	#1
69&72Bowties Registered User Join Date: Jun 2002 Location: Pineville, LA Posts: 78	700R4 question I just acquired a 700R4 out of a mid 80's van... It came with only the detent cable... I am planning on changing the fluid, filter and adding a shift kit to it and buying a new converter. How do you wire up the valve body to lock up the converter? It seems like I read somewhere that you wire the solenoids up a certain way to run off of one 12v wire? If so does anyone know how or where to get the directions for this? Thanks, Bryan __________________ Bryan@ideamill.net 71 Chevy Custom 20 Suburban 69 Chevy Camaro

07-01-2002, 01:23 PM	#2
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	There are several kits available to make the converter lock up. The Painless wiring kit has a pressure sensor that locks up the converter. B&M and Ron Francis have a speed sensor that locks it up. I only know of people using the speed sensor. You mount an adjuster in your cab and you adjust the speed that the converter will lock and unlock at. Usually about 45, depends on your gearing. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

07-01-2002, 02:54 PM	#3
69&72Bowties Registered User Join Date: Jun 2002 Location: Pineville, LA Posts: 78	I really dont know if I want something in the cab that controls the lock up.. I think I would rather just have the pressure sensor to control it all.. I will check out the painless wire kit... __________________ Bryan@ideamill.net 71 Chevy Custom 20 Suburban 69 Chevy Camaro

07-01-2002, 08:13 PM	#5
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	Hey check out my post on torque convertors. Bigvinnie put a link on there to a site that has a switch that integrates your brake switch to turn the convertor off. I am sure they have an automatic switch to turn it on too. __________________ I'm going to Law School, wanna debate? It's good practice.

07-01-2002, 11:36 PM	#6
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	Since you will have it apart, talk to the guys at 700r4.com. They can provide you with directions so that you set up your TV cable correctly. When you have the pan off, it is fairly easy. I use the Painless wiring kit and a vacuum pressure sensor and a brake switch (replaces the existing one). It will only lock up in overdrive when there is sufficient vacuum (engine not under significant load) and unlocks when the brakes are applied. I'm thinking there should be a relay in the circuit though to offload some of the amps on the ignition system. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

07-01-2002, 08:07 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Don't forget to get a TV cable. Once you have it all put together, I would go to a large tranny shop, and have them put the oil pressure guages on it to ensure the cable adjustment is perfect. These trannys are very picky, and self destruct with little to no notice when the cable is misadjusted.

07-02-2002, 02:20 PM	#7
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	You also have the option of going with a non-lockup converter. This is the route I went and 40K later, I have no complaints. I prefer to keep things simple. __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

07-02-2002, 04:44 PM	#8
69&72Bowties Registered User Join Date: Jun 2002 Location: Pineville, LA Posts: 78	I will keep thinking and digging on this issue... I will be running 3.08 gears at first so I will have to wait and see, will probably go up to a 3.55 gear soon.... Thanks for all your help... __________________ Bryan@ideamill.net 71 Chevy Custom 20 Suburban 69 Chevy Camaro



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