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Replacing 87 700r4 with a 88 t400

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rooferbret, Nov 22, 2004.

  1. rooferbret

    rooferbret 1/2 ton status

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    Sacramento,CA
    My Jimmy is an 87.
    Are there any issues with the computer and or the connecter that plugs into the 700r4 when swapping to an 88 t400?
    Any help much appreciated.
    Thanks, Bret.
     
  2. Rolled

    Rolled 1/2 ton status

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    You should get a chip that came from a TBI with th400.

    The following is AFAIK /forums/images/graemlins/smile.gif

    The only wire used, from the 700, is the TCC wire, The High Gear wire is not used... TCC wire goes to a relay and then to the th400 for its kick down input.

    You could get a foot pedal kick down switch, as well. If you do, I would still get a th400 chip.
     
  3. rooferbret

    rooferbret 1/2 ton status

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    Seems simple, Thanks for the info.
    Bret. /forums/images/graemlins/waytogo.gif
     

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