4L60E to 4L80E Trans Swap in 96 K1500?

Discussion in 'GM Powertrain' started by BMason, Nov 21, 2011.

  1. BMason

    BMason New Member

    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. Joeairforce

    Joeairforce Epic Member 5+ Years 100 Posts

    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....
  3. BMason

    BMason New Member

    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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