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Thread: 6l80 TCC LINE PRESSURE ISSUE CIRCLE D 3000 HP

  1. #1
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    6l80 TCC LINE PRESSURE ISSUE CIRCLE D 3000 HP

    Okay, This thing has me stumped. I have spent all of my free time over the last four days scouring forums and making changes to the tune to no avail. I have contacted Circle D as well as my local tuner and tried their recommendations as well.
    Here the situation:
    2012 Caprice PPV
    L92 short block
    6L80 trans
    BTR Stage 1 N/A cam
    Circle D 278mm 3000 stall HP converter
    CAI and axle back exhaust

    TCC disabled in 1-4
    TCC desired slip = 0 in all tables
    TCC ramp table = all cells increased +90psi
    Max Pressure = 138.2 all cells
    Regulator gain= 1.5 (have tried 0, 0.5, 1, 2 and 8 as well, no change)
    Regulator offset= 90psi (have tried 40, 60,and 110 no change)
    TCC desired slip= 0 on all tables
    TCC adapt MIN&MAX= 0 ( have tried 0/100, 50/100, 100/100, no change)

    I have also tried maxing the misfire tables(not on this tune) with no change.

    The TCC line pressure ramps in to ~45psi to lock the clutch, bleeds off to ~20psi, clutch starts slipping up to ~50rpm, TCC pressure ramps back to ~45psi and clutch locks. This cycles approximately every 2 seconds while cruising. It is not affected by speed. I have locked the TCC through the VCM Scanner and it ramps to 594psi and holds. The only changes that appear to have had any affect is setting the desired slip tables to zero, as before it would slip even further before the TCC line pressure would increase and re lock. I have attached a log with the issue as well as the current tune.
    ANY help is greatly appreciated!!
    Attached Files Attached Files

  2. #2
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    At the TCC ramp table. Zero out the -40 to the 0 rpm cells and retest.

  3. #3
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    Zeroed out table from -40 to 0 rpm. No change. Attached is the log and tune.
    Attached Files Attached Files

  4. #4
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    Most likely this is the same problem i had in my 2010 holden ute.

    In the short the fix was to flash in a camaro calibration and problem disappeared. you can fuck around with tcc stuff as much as you like it wont make any difference.

    Also had to reconfigure the tapshift to get it working again.

    haha, just downloaded your tune. EXACT SAME OS/CAL AS MY 2010.

    start with attached tune and you will be sweet.

    transmission.hpt
    Last edited by Tre-Cool; 06-14-2017 at 05:47 AM.

  5. #5
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    Okay, so I just need to license the file and do a "write entire" to my TCM only, correct?

  6. #6
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    ***PROBLEM SOLVED***The answer was yes. I licensed and loaded the trans tune you posted and it immediately solved the problem. With the gain at 1.5 and Offset at 90 it holds constant at 60psi, Thanks a ton Tre-Cool. Now I just need to soften up the shifts a little so the wife is happy(its "her" car.)
    Last edited by Kabooms; 06-14-2017 at 11:15 AM.

  7. #7
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    yeah licensing other files is one of the major gripes i have with HPT's licensing structure. That's why i hardly use it. Must be a nightmare for guys doing conversions needing to chop/change different hardware/software versions around.

    For others that may use the same file. Do the Full flash. Then do a cal flash of your original auto tune.

    The problem seems to be in the underlying OS code & not in the calibration.

  8. #8
    Quote Originally Posted by Tre-Cool View Post
    Most likely this is the same problem i had in my 2010 holden ute.

    In the short the fix was to flash in a camaro calibration and problem disappeared. you can fuck around with tcc stuff as much as you like it wont make any difference.

    Also had to reconfigure the tapshift to get it working again.

    haha, just downloaded your tune. EXACT SAME OS/CAL AS MY 2010.

    start with attached tune and you will be sweet.

    transmission.hpt
    Thanks for this, fixed our 2014 VF with a Circle D.

  9. #9
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    Can you help me with that tcc problem i also have a line pressure prob 2010 camaro ss circleD converter

  10. #10
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    Quote Originally Posted by 4wheelinls1 View Post
    Thanks for this, fixed our 2014 VF with a Circle D.
    Interesting, I would have thought yours would of been a 24256125 based OS at least. The tune i posted was a 24256025. Which i didnt think where compatible.

    Quote Originally Posted by tjm9746a View Post
    Can you help me with that tcc problem i also have a line pressure prob 2010 camaro ss circleD converter
    Have you downloaded my tune that was attached earlier and done a compare?

  11. #11
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    Tre-Cool,
    I sent you a pm about this issue with a different car. If you have time I would really like to speak with you.

  12. #12
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    I work away for 8 days at time & often forget to check back into the forum when im on days off.

    So If anyone sends me a pm, I'll get back to you when i can.

  13. #13
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    PM Sent to Tre-Cool about the same problem.

  14. #14
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    If anyone is still around on this thread, the suggestion in the post did help my problem like everyone else. However, I lost my sport drive mode button. Did anyone else get the same problem? If so, how did it fix?