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post #1 of (permalink) Old 08-03-2001, 02:59 PM
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700r4 torque converter lockup circuit

I recently toasted the 700r4 on my 4x4. I did some trouble shooting and realized that the trans went because the previous owner unhooked all of the emissions related stuff including the circuitry to lock up the otrque converter (guy who rebuilt it confirmed that). Anyways I have found a few websites that deal with installing a do it yourself lockup kit (http://www.thegrid.net/thedrivetrainpage/700inst.htm) involving a vacuum switch and a brake cancel switch. Has anyone ever done this before? I am having trouble figuring out what kind of brake cancel switch to use (gm part# etc..) any help would be appreciated.

Regards, Chad Lehner

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post #2 of (permalink) Old 08-03-2001, 05:31 PM
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Re: 700r4 torque converter lockup circuit

I am thinking that most GM brakes switches are either two prong or four prong. Usually the four prong switch is used with vehicles equipped with cruise control and/or lock-up torque converter. My 82 GMC with both cruise control and turbo 350C uses a four prong brake light switch. Two of the prongs are used for the brake lights, while the other two prongs are wired to release the cruise control and/or lockup clutch when the brakes are applied. Most any GM vehicles built after 1984 had a lock-up torque converter. It might be worth while to wire the 700R4 torque converter to lock-up when in high gear only.

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post #3 of (permalink) Old 08-04-2001, 06:26 AM
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Re: 700r4 torque converter lockup circuit

Here's another page that may or may not help you:

JEEP, it's what's for dinner.

<A HREF="http://www.arkansasmud.com/" target="_new">
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