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  1. #1
    Jr. Apprentice
    Join Date
    Nov 2011
    Madison Lake, MN

    Default 4L60E to 4L80E Trans Swap in 96 K1500?

    I am a new member and this is my first post on this site.

    Just got a 96 K1500 from my father in law, the engine was blown when he got it so I installed a 2000 5.7L. Engine swap went fine runs like a top, transmission on the other hand seems to slip trying to get third and then sticks in second. From all the similar posts that I've seen say the 3 and 4 clutches are most likely gone and it needs rebuild or replace.

    My question is; would it be possible to install the 4L80E out of the 2000 Express Van (engine doner) in place of the 4L60E problem trans?

    Thanks for any advice.

  2. #2


    Yes, it's possible... It's not exactly a just bolt in and go swap though... The cross-member has to be relocated back, the driveshaft/s have to be lengthened/shortened, the wiring plugs are different and have to be swapped, the computer has to be reprogrammed (or get an aftermarket controller for the trans)..... You'll also need a 4WD trans (unless you meant to say your truck is a C1500) or find a 4WD output shaft for the 4L80E, as well as swapping the input of the t-case or finding a t-case that will just bolt up behind the 4L80E..... So yes, it's possible..... but it'd be cheaper/easier to just replace/rebuild the 4L60E....

    Airforce Veteran (7 years)

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  3. #3
    Jr. Apprentice
    Join Date
    Nov 2011
    Madison Lake, MN


    Thanks for the help. I think that I may have found a replacement if not I did find an experienced person to help with rebuild.

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