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Thread: 6L90 engaging 3rd while in 2nd,,

  1. #1

    6L90 engaging 3rd while in 2nd,,

    please, look at the attached log,,
    you will see TCM is applying max pressure (290.x) to 3-5-R rapidly while gear is still in 2nd,, this only happens at the very first time car goes in 2nd after each ignition,, this stalls the whole drive train just like if i selected P while moving,,

    i have attached tune file as well,,
    thanks in advance,,
    Attached Files Attached Files
    09 CTS-V A6

  2. #2
    anyone please,,

  3. #3
    Tuner
    Join Date
    Mar 2006
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    DFW, Tx
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    156
    Just winging it.....but can you/have you tried flashing it back to stock to see if it still does it?
    2013 ZL1 A6

  4. #4
    Senior Tuner
    Join Date
    Jul 2020
    Location
    VIC Australia
    Posts
    1,107
    I know I'm replying to an old thread.

    Noticed the same thing on mine only when first starting off. To complete the thread I'm having a guess its the clutch purge function.

    FYI screen shot is from the OP's log.

    Capture.PNG

  5. #5
    Senior Tuner
    Join Date
    Jul 2020
    Location
    VIC Australia
    Posts
    1,107
    Edit.
    Difference is I don't have my PCS max pressure aka Max Pressure set to 2000. Mine doesn't drag like the OPs does and I can't feel it. Noticed other PCS valves do it to.