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Thread: 4l80e Cal & Diagnostics

  1. #1

    4l80e Cal & Diagnostics

    I am struggling making sense of calibration on 4L80e and/or diagnosing trans or wiring issues. Looking for help on two items, and of course any other ideas/recommendations.

    1.) Does anyone have a log file they can share w/ with properly functioning 4l80e (street + WOT pulls) that has all/necessary TCM channels turned on for trans function/performance diagnostics? I would like to compare this to what I am looking at. Info on my vehicle is below - the closer the vehicle the better, but any correctly functioning 4L80e data would be helpful.
    2.) Does anyone have recommendation for line pressure sensor that I could plug into MVPI Pro analog or CAN? Or just required pressure range for a sensor.

    2007 Avalanche - LS3 417ci, ported heads, 1-3/4" primary tubes, 2-1/2" collectors, 2-1/2" Y-pipe, ATI 2800rpm 3/plate, performance build ~800hp 4L80
    VIN: 3GNFK123X7G249615
    Last edited by dlouth@prattmiller.com; 01-07-2019 at 09:51 AM.

  2. #2
    1.) Does anyone have a log file they can share from properly functioning 4l80e (street + WOT pulls) that has all/necessary TCM channels turned on for trans function/performance diagnostics? Stock or w/ med stall (~2800-3200rpm) would be preference.
    Thanks Ahead.

  3. #3
    Advanced Tuner
    Join Date
    Feb 2015
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    4L80E shift solenoid pattern is different to what is in your tune

  4. #4
    Luke, Not sure this is issue. My current TCM calibration was written to TCM w/ latest GM OS/cal for 2007 Silverado 2500 6L w/ 4L80E - I found/used the VIN # for TCM programing from a tune file I found in repository (1454439124.hpt) for stock truck. I haven't changed the Shift Solenoid Pattern - but I am not familiar w/ C-B-A bits vs. Solenoid State Table. Can you revisit this and if pattern is wrong, let me know what it should be? Also, I can't find anything in HP Tuners Forum, HP Tuners Help VCM Editor, or in Tuning School manuals that covers the Solenoid State Table, so any pointer in right direction for this might be helpful. Also, does this have anything to do w/ encode bits for PRNDL, DRI. PSM, or NSBU?

    Shift_Solenoid_Pattern.PNG
    Silverado 2500.PNG
    Solenoid_States.PNG

  5. #5
    1.) Does anyone have a log file they can share from properly functioning 4l80e (street driving + WOT pulls) that has all useful TCM channels turned on for trans function/performance diagnostics?
    Thanks Ahead.

  6. #6
    ???