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Thread: 6l80 Tap Shift

  1. #1
    Junior Member
    Join Date
    Apr 2012

    Default 6l80 Tap Shift

    Hi guys, looking for a little help. Have a customer in Dubai with an E38-T43 combo and we are trying to get the tap shift to work. Everything is turned on in the calibration and set up for a wired switch. Can look at the PID's and it says its working, yet no shifting. In order to make it work I think I need to incorporate a BCM, or go to a compatible OS. Am I on the right track or am I missing something? Does anyone have a tune that may work? Can this tune be fixed? Any help is appreciated.T43tuned_0000.ctzE38tuned_0000.ctz

  2. #2
    Lifetime Member Tre-Cool's Avatar
    Join Date
    Feb 2006


    try playing with the shift setting.

    I don't have my laptop in front of me, but there is a bunch of options that list D1 to D6. Try it with anything from D3 to D6.

    On the corvette they use D4 & are direct wired. Commodore platform is normally D6 which initiates the TUTD mode via a resister.

  3. #3
    Junior Member
    Join Date
    Apr 2012


    Thanks for the reply, Ive been playing with it a little. I saw that his brake pedal was wired wrong, so its always saying applied. I believe if I can correct this, it should work. Pin 6 in the trans and 9 in the E38 need to have no power when the brakes are applied. I will let you know what happens.

  4. #4
    Lifetime Member
    Join Date
    Mar 2009


    I had the same issue on a jeep swap and had to find a corvette tcm cal in order to get it to work. Make sure you flash in a like tcm OS. There is a thread on here that list them.
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

  5. #5
    New Member
    Join Date
    Feb 2018


    Solved ?

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