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Thread: New to EFI Live 6L90 2500 HD Question

  1. #1
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    Default New to EFI Live 6L90 2500 HD Question

    First let me state I have used the search function here and done 5 days worth of reading and cannot find a clear answer.

    I have worked through a few tunes on the engine side of things and got that where I want it for now, but do not see anyplace to adjust trans shift schedule params?
    Anyone worked with EFI Live on the 2011 GMC 6.0 Gasser with the 6L90?
    I thought this package would allow me to modify the trans tables do I need a different software or license?

    EDIT:
    Had a communication error tried it again this morning and it reads the T43 TCM Controller now.
    Odd... but digging/learning begins..


    -Rob
    Mangieris Rod and Custom
    Last edited by 496Stingray; April 12th, 2015 at 05:38 AM.

  2. #2
    Joe (Moderator) joecar's Avatar
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    Default

    Do you see where in the T43 ctz file...?

  3. #3
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    Yep works great. I think powering down the V2 after reading the ECM solved the issue of not reading the TCM.
    I am not 100% I have the process to cut back the torque management down yet but the timing changes on the engine tune and the 20% lower shift points below 62.5% throttle have the truck driving far nicer when running without a trailer or a load. The stock HD tuning has the shift points set far above where the engine runs out of power resulting in a part throttle "lift to shift" when just tooling around town. Also city mpg is up from 9.3 to 11.4 just from the spark timing mods I made over the past 5 days. The lowered shift points should augment it. Not that I care too much about mileage but it was more annoying to drive. I left the tow haul settings the same so I can run that when loaded.

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