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Swapping 1999 into 1995 k3500

Discussion in 'All Other Transmissions' started by Cj1995 dually, Sep 8, 2017.

  1. Cj1995 dually

    Cj1995 dually New Member

    6
    4
    Sep 8, 2017
    Swanzey,nh
    Is it possible to swap a 4l80e out of a 1999 k2500 4x4 into my 1995 k3500 4x4? If so what will I need to change? Thanks
     
  2. Jaryd

    Jaryd Oh the sound a 6.5 makes

    648
    792
    Nov 27, 2016
    Hodges, SC
    Welcome man. Good to have you.

    I'm not a transmission guy so you are getting what you are paying for on this one. I'm pretty sure there ain't a big difference in the transmissions for the years you are talking about. I think you would be ok with the swap.

    Now if you were going from 4l60 to 4l80. That would be a different story.

    @THEFERMANATOR to the rescue

    He will hook you up with anything you need to know
     
  3. Cj1995 dually

    Cj1995 dually New Member

    6
    4
    Sep 8, 2017
    Swanzey,nh
    Its a 4l80e to 4l80e I was told by some its just an cooler line adapter I need and others say its not possible. Hopefully @THEFERMANATOR can clarify
     
  4. Jaryd

    Jaryd Oh the sound a 6.5 makes

    648
    792
    Nov 27, 2016
    Hodges, SC
    The ones that say it's not possible are probably thinking of 4l60 to 4l80. It is possible to make that swap but that swap takes a lot of mods I think.

    It may just be the trans cooler adapter that you will need for your swap though. As soon as @THEFERMANATOR sees this he will let you know exactly what you are going to need to do.
     
  5. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,978
    2,306
    May 9, 2008
    ZEPHYRHILLS FL
    Yep, that's it. You used to be able to buy the adapters pre made. Just make CERTAIN to use the correct trans fittings in the correct spot on the 99. One of the fittings is long(99% certain it's the rear one), and it will run dry on oil if you install the wrong fitting as it will dump the oil back to the pan instead of feeding the lube circuit. Only other thing is 97+ used 3/8" cooler lines vs the 5/16" of 96 and older, but it's not an issue to concern yourself with.
     
    Husker6.5 and Jaryd like this.
  6. THEFERMANATOR

    THEFERMANATOR FRANKENBURBAN Staff Member Lead Moderator

    8,978
    2,306
    May 9, 2008
    ZEPHYRHILLS FL
    Also, make sure and use the correct torque converter. There was some other changes when they switched to the rear lube return line, and they list different torque converters for 91-96 vs 97+.
     
    Husker6.5 and Jaryd like this.

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