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  1. Thread: ZF tuning app

    by ic3man5
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    7
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    3,389

    I've haven't made any improvements to this sadly,...

    I've haven't made any improvements to this sadly, family life got in the way. I've never used the tuning school spread sheet.
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    I would love anything you can hand over. I...

    I would love anything you can hand over. I confirmed engine parameters aren't a straight swap from 2019 to 2022. It REALLY wasn't happy at idle, looks like they moved some things into the OS. I'm...
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    Thank you for this! There are a lot of things in...

    Thank you for this! There are a lot of things in here that never looked right to me that looks like they fixed from the 2019 to 2022 models.
  4. alright I lied, I thought it was a fix but I...

    alright I lied, I thought it was a fix but I can't actually edit any of the values in the tables in the beta version. 5.0.4 looks like it fixed the bug of not showing [READ ONLY]. Going to contact...
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    thanks! Which table are you talking about?...

    thanks!

    Which table are you talking about? I've learned a little bit more about how the transmission works. The slip times seem to be purely a fail safe, if it slips over the specified time it...
  6. I went back to 4.11.1325 Beta and this isn't an...

    I went back to 4.11.1325 Beta and this isn't an issue for anyone having issues with this.
  7. some tables [READ ONLY] after updating to 5.0.4?

    I have some tables that I can't configure anymore after updating to 5.0.4 (I didn't notice it until now).

    The tables show [READ ONLY] after the description in the window title and are not...
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    I need to update all the downshift stuff, it...

    I need to update all the downshift stuff, it doesn't work the way I originally thought it did and I still don't fully understand it. I need to spend a couple more hours with it to completely figure...
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    Edited my response to include downshift tuning...

    Edited my response to include downshift tuning also.
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    I did a bit of reverse engineering on which...

    I did a bit of reverse engineering on which clutches are active in each gear as I couldn't find any useful information online for the ZF8HP75. This is for a 2019 RAM 5.7L which I don't believe should...
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    Thanks! I just reset all the transmission...

    Thanks! I just reset all the transmission parameters to stock and realized I'm not actually resetting the adapts as much as I thought I was. The scanner seems to do a little bit to reset the adapts...
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    I updated my post above, I managed to finally...

    I updated my post above, I managed to finally tune out the damn bump felt near idle on the 3-2 and 2-1 downshifts especially when the idle is increased.
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    What is actually happening when it doesn't shift...

    What is actually happening when it doesn't shift from 1st to 2nd? I would correlate shift pressure to shift time more than the torque intervention. If you increase power on the clutches then you will...
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    You might not have enough pressure in the upshift...

    You might not have enough pressure in the upshift oncoming clutch pressure tables depending on how much power you added. There is a Flare Adder table (on the same tab) that adds more pressure the...
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    The 2019+ is a 8HP75. Any chance you have any...

    The 2019+ is a 8HP75. Any chance you have any stock files for 2021+?
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    Try lowering the shift point (rpms) and see if...

    Try lowering the shift point (rpms) and see if that helps. When I raised mine I had really strange issues I wasn't able to correct (I'm sure there was a limiter somewhere else but didn't have time to...
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    bump. I wish we had the tune repository...

    bump. I wish we had the tune repository functional again...
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    Nope, I was hoping someone would eventually...

    Nope, I was hoping someone would eventually respond here with a tune. I can post my 2019 stock tune if that helps?
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    Thanks, My model year is also a 19. Since the...

    Thanks, My model year is also a 19. Since the tune repository doesn't exist anymore this seems like the only way to do things now.
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    I'm not sure but why exactly are you modifying...

    I'm not sure but why exactly are you modifying those tables? What DTCs did it throw?
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    I've been staying in normal for all the shift...

    I've been staying in normal for all the shift times so far but I have a 2019 RAM so I'm assuming I just don't have the other modes. I haven't found a time when its not shifting the way I changed /...
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    I've had a chance to experiment with stuff more....

    I've had a chance to experiment with stuff more. Take this with a grain of salt as this could be completely incorrect and only based on my experience and tuning so far.

    Shift Pressures -> Upshift...
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    2021/2022 5.7L RAM stock tune request

    Anyone have a stock tune for the 2021/2022 model years with the 5.7L?
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    I'm still working with support but recent beta...

    I'm still working with support but recent beta (4.11.771) a couple days ago added a lot of new parameters for the 2019 RAM 8HP75.

    Here is the list that was added:
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    I looked at a 2018 demon file I found on the...

    I looked at a 2018 demon file I found on the forums and now I just have more wants. Demon seems to have lower pressures compared to the RAM which makes sense. I've tuned the 6L80 wrong before, I for...
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