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  1. #1

    Question transmission wires

    I need to know what wires go where i went from a 4L60E with a round plug to a 700R4 with a square plug i need to know were they go

  2. #2


    I'm not sure what wires go where, but I do know that alot of them will probably not be used. The only thing electrical going in/out of the transmission case is the reverse light circuit and the torque converter lockup control.

    1991 Chevy Suburban 1/2 ton 2WD w/ chevy SBC 350-3/4 ton drivetrain upgrade w/4.10 gears 200K miles
    2005 Saturn ION-2 Stock 277K miles
    1982 Bronco, 1993 Bronco (sold), 1971 M35A2 Deuce and a Half

    There are 10 kinds of people, those who understand binary, and those who dont...

    Remember kids, the only difference between screwing around and science is writing it down- Adam Savage

  3. #3


    You will need only 2 wires to make the 700 work. B+ voltage from the brake switch and the ground signal from the computer. Your problem will be when the computer sees it has no EPC control it will disable lock up and try to put your transmission in failsafe, which of course it can not do. So you will have no lockup and if you drive it this way you will fry the converter in short order.
    To make this 700 work you will need to install a lockup kit.
    Summit sells Painless Lockup Kits as well as TCI. Several other companies make these kits. The bottom line is your 4L60E computer will not make your truck lock up without some help from an aftermarket kit. HTH

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

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