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Thread: Trans not shifting at WOT

  1. #1
    New Member
    Join Date
    Jan 2004
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    7

    Default Trans not shifting at WOT

    Hi,
    I have a 2002 Camaro 408 with a D1SC. The trans is a
    *** ( not FLT) level 4 4L60E transmission.
    Ever since the blower I can not get it to shift at WOT. No matter where I set the MPH or RPM it would rev to the limiter. When this happens, the scans shows PCM commanding the gear to shift...but it just revs to the limiter.
    The funny thing is when I removed the blower it shifts correctly.

    The vendor ask me to check the line pressure with the trans electrical connector off ( since that gives it full pressure) and it was fine with 250 psi. They told me the trans was fine and I needed a TCI trans controller to be able to shift it. They had experienced this with a customers car and this was what fixed it.

    Have anyone run across any problems similar to this?
    I am running EFIlive V1 commercial.


    Thanks,
    Andy

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
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    27,752

    Default

    Andy,

    In your tune file I see the following values:
    D0915 == 59 mph
    D0930 == 60 mph

    this could be why the WOT 2->3 shift doesn't trigger;

    set D0930 less than D0915 by at least 5 mph.

    BTW, your vehicle voltage is dropping to 12.4V... something may be wrong with your alternator.

    Regards,
    Joe

  3. #3
    New Member
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    Jan 2004
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    Default

    Thanks Joe!

  4. #4
    Junior Member
    Join Date
    Oct 2006
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    15

    Default Boucning off rev limiter before shifting

    DId that fix it? changing D0930 and D0915?

  5. #5
    Member
    Join Date
    Oct 2006
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    60

    Default

    All ears here; what was the outcome?

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