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Thread: 6l80e to 4l80 conversion on a 2009 GMC Yukon XL Denali with 6.2

  1. #1
    Potential Tuner
    Join Date
    Jul 2019
    Location
    Morgan city, LA
    Posts
    7

    6l80e to 4l80 conversion on a 2009 GMC Yukon XL Denali with 6.2

    Hello all, I'm new here. Currently I'm in the process of making a few changes to my Denall. First and foremost I want to install a monster 4l80e rated for 1100hp from the current stock 6l80e transmission. Then there will be significant changes to the l9h 6.2l engine, starting with LS3 heads, next BTR stage 2 V2 truck cam, headers, borla exhaust and last but not least a pro charger supercharger. My questions are..... What will it take to do the conversion on transmission and is there a way to run timing gears on an EFI engine.?

  2. #2
    Potential Tuner
    Join Date
    Jul 2019
    Location
    Morgan city, LA
    Posts
    7

    Found out on my own!

    The tranny should bolt right on from what I've heard and everything should line up nicely. The only question I have left is can I run timing gears on an EFI engine without tripping the KS?