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Thread: T43 Performance shift mode non existant

  1. #1
    Tuner in Training
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    T43 Performance shift mode non existant

    Needing a little help figuring out why I cant get different shift modes, or at least insight on perhaps it doesn't exist on this OS.

    On my Lincoln everything works perfect, in drive normal shift pattern. Pull it down one selection and it goes into the performance shift pattern.

    Now on my 08 Envoy I have swapped to a 6L80 using a 2008 Escalade trans and OS. I did have to do a segment swap to get my PRNDL and Speedometer to work correctly, but those came from my friends 2009 T43 in his 9-7X that also came from a truck application.
    As far as performance mode, I can not seem to get this function to even show up on the scanner. I have changed the shift schedule drastically enough that it would be obvious as soon as you pulled it down a gear.

    The one weird thing is when I do pull it down say around 55-65 it does downshift into 4th almost like it goes to a tow haul mode.

    In my log you can see at 30 seconds in where I pull it down, also at 52 seconds I bump it back up into drive.

    envoy leaving gas station.hpl08 envoy denali 6.2 motor and trans with kelvin segments.hpt
    65 Lincoln
    LY6 ASA cam
    6L80E
    E38

  2. #2
    Tuning Addict 5FDP's Avatar
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    I have never seen performance mode on a truck calibration.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
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    Quote Originally Posted by 5FDP View Post
    I have never seen performance mode on a truck calibration.
    Thats what I was afraid of. Guess Ill have to play with Corvette stuff.

    But what is weird is how it did change somewhat when I pulled it down, Perhaps I could use the Tow/Haul mode as my performance settings
    65 Lincoln
    LY6 ASA cam
    6L80E
    E38

  4. #4
    Tuning Addict 5FDP's Avatar
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    I mean I guess you could. I just make my 6L80e shift how I want it all the time. It's rather easy to make it shift quick and smooth at part throttle while also being firmer at full throttle.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
    Tuner in Training
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    Quote Originally Posted by 5FDP View Post
    I mean I guess you could. I just make my 6L80e shift how I want it all the time. It's rather easy to make it shift quick and smooth at part throttle while also being firmer at full throttle.
    Oh I get that, my lincoln does just that. But in this case its because its my wifes daily I built for her.
    I want to basically neuter it for her, but when I get in I want to be able to pull it down into my shift pattern and be able to get up into the power.
    She doesnt need the full potential of 6.2 and will never even know what she is missing.

    Just dawned on me, I need to read just the TCM of my friends G8 and write it into mine, both are 08 so it should be safe
    65 Lincoln
    LY6 ASA cam
    6L80E
    E38

  6. #6
    Potential Tuner
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    DId this work? I have a similar issue where my 6L wont go into tow haul mode, I was thinking about trying to pull a file from a known working one and push it into mine