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Thread: 2008 6L90E with L83 Gen V problems.

  1. #1

    2008 6L90E with L83 Gen V problems.

    Hi,

    So I just swapped out the LS3 in my Jeep with a 2015 L83 thinking that the 2008 6L90E would still work....it does not.
    It kind of shifts now and then, but locks up the wheels for a second when shifting so this is a no go.

    After a lot of searching I have concluded that the TECHM needs to have a compatible OS to the L83. I thought any 6L90E would work, but turns out there are differences.

    Can I flash a 2015 OS to a 2008 TECHM ? Maybe not with HPT but with a MDI2 ?
    If not, will a 2015 TECHM fit a 2008 transmission?
    Anybody know anything about this?

    Appreciate any feedback on this problem !

  2. #2
    Advanced Tuner IARLLC's Avatar
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    No. There are changes in the TCM between 2009 and 2010. Maybe a 2015 would bolt in. Not sure.

  3. #3
    I was worried about the programming. Did som more searching at it seems that a 2011+ TEHCM will bolt in so I will try that.