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Thread: 6L80E TCC disable?

  1. #1
    Tuner in Training Francuzzz's Avatar
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    6L80E TCC disable?

    Hello!

    I need help with transmission of Suburban 2015 6L80E
    Transmission was rebuilded. But after some time it has problems again, I was told by a transmission shop that the 6L80/90's wear the torque converter out pretty fast due to the amount of slipping they allow. Now I want to disable TCC lockup to eliminate this problem in future. I have disabled DTC of Torque Converter Clutch, then disabled TCC stuck diagnostic test, and then in menu Torque Converter\ApplyRelease change all values.
    Apply set to 512km/h
    Release set to 500km/h

    Does it enough? Or I need to disable something else? I tried to disable "High Speed Lock" but if I disable it car will not go

    May be someone can help to understand how TCC to disable right?
    2015 Suburban _TCM_1GNSKJKC5FR277853_stk.hpt
    2015 Suburban _TCM_PCM_1GNSKJKC5FR277853_TCC_disable_DTC_Off.hpt

  2. #2
    Senior Tuner
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    Up to you, but consider leaving the tcc lockup enabled in 6th gear for economy. Zero the slip tables, move over the desired pressure columns at least 3 to the left, re-enable your dtc tcc checks.

  3. #3
    Tuner in Training Francuzzz's Avatar
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    Thank you for your reply. No I don`t need fuel economy. Make how you said - zero slip tables and disable dod tables. But I don`t understand what need to do with desired pressure? Can you explain please. Thank you.

    2015 Suburban _TCM_PCM_1GNSKJKC5FR277853_TCC_disable_new.hpt

  4. #4
    Senior Tuner
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    Not needed if your disabling TCC