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Thread: ZF8HP70 fails 1>2 shift under WOT

  1. #101
    So just keep increasing the tourque reduction till it shifts? Ive tried, but with not much luck. Do i need to increase forced torque intervention as well?
    2019 challenger rt
    k&N cold air intake
    92mm hellcat throttlebody
    ported 392 intake manifold
    ported eagle heads
    Cammotion custom 222/234 cam
    stainless works long tube headers and catless mid pipes
    3' catback with h-pipe & pypes violator mufflers
    e-85 tuned

  2. #102
    Advanced Tuner
    Join Date
    Jan 2022
    Posts
    859
    increasing forced will make the rpm graph no longer have a peak

    makes it nose over

  3. #103
    Quote Originally Posted by LilSick View Post
    increasing forced will make the rpm graph no longer have a peak

    makes it nose over
    so should i decrease forced torque and increase main torque intervention? what about gear engagement torque intervention? it seems like 1st gear is the worse for shifting, whether it be at part throttle with long shift, or wot with no shift. but 3rd through 6th are good and firm. 7th and 2nd are a little sloppy but nothing terrible and eight is kinda in the middle. not bad, but nothing great. id really like some help and get this fixed. ive tried every i can think of and nothing really works. 1 thing may help, but then makes 10 other things worse.
    2019 challenger rt
    k&N cold air intake
    92mm hellcat throttlebody
    ported 392 intake manifold
    ported eagle heads
    Cammotion custom 222/234 cam
    stainless works long tube headers and catless mid pipes
    3' catback with h-pipe & pypes violator mufflers
    e-85 tuned

  4. #104
    Advanced Tuner
    Join Date
    Jan 2022
    Posts
    859
    Quote Originally Posted by james1595 View Post
    so should i decrease forced torque and increase main torque intervention?

    what about gear engagement torque intervention?
    dunno... i do not have your current tune

    gear engagement tq interv is odd huh? stock trans tune has all zeros for low gear (and R) like they are relying on table 36000 garage shift tq reduction for that one, but has values for all other gears. i leave it stock

  5. #105
    Advanced Tuner
    Join Date
    Jan 2022
    Posts
    859
    went last night

    spark and fuel only

    https://youtube.com/shorts/ZA_ghsXCY...mQdGadlabF08d2