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Transmission controller question

Discussion in 'The Garage' started by hidesertwheelin, Dec 13, 2006.

  1. hidesertwheelin

    hidesertwheelin 1/2 ton status

    Nov 13, 2004
    Likes Received:
    Hesperia, CA
    How is a 4L80 on a 91 Suburban controllerd? Does the tranny have it's own ecm or is it wired into the tbi ecm? If it's a stand alone ecm, can I find one and use it to swap a 4l80 into my 90 Suburban? Same thing if it's attached to the efi ecm, can I swap that whole ecm into my burb?
  2. dyeager535

    dyeager535 1 ton status Premium Member

    Dec 13, 2000
    Likes Received:
    Roy WA
    All controlled via the ECM.

    Yes you could swap the whole thing over. A bit of work, but certainly do-able.

    Diesels were standalone controllers, and the aftermarket has them as well. For the cost, I'd just make what you've got work. Shouldn't be hard to add it to your existing setup.

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