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Thread: C6 w/ A6 stuck in 4th after ECM flash only?

  1. #1
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    Default C6 w/ A6 stuck in 4th after ECM flash only?

    I finished an ECM flash on a 08 C6 LS3 and went for a test drive. the car at a stop will stumble and jerk as the HUD shows the gear position going from 1st to 2nd then 3rd and back to 2nd the whole time at a stop. as soon as I take off it will snap into 3rd then quickly into 4th and hold it. i floored it and it only speeds up in 4th and the paddles will not let me up or down shift? I did nothing with the TCM. I used V2 w/ 7.5, 83 build - E38

  2. #2
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    reflashed it back to stock and the paddles work correctly. making a file without any changes to the torq reduction section.

  3. #3
    Lifetime Member MN C5's Avatar
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    Quote Originally Posted by DVR IMP View Post
    I finished an ECM flash on a 08 C6 LS3 and went for a test drive. the car at a stop will stumble and jerk as the HUD shows the gear position going from 1st to 2nd then 3rd and back to 2nd the whole time at a stop. as soon as I take off it will snap into 3rd then quickly into 4th and hold it. i floored it and it only speeds up in 4th and the paddles will not let me up or down shift? I did nothing with the TCM. I used V2 w/ 7.5, 83 build - E38
    Need a copy of the file to comment on the problem.

  4. #4
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    I fixed my screw up. i managed to change torque control in the TCS!! trans doesn't work well when you mess with it.

  5. #5
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    Beat me to it, I did that too a while back. I found that just leaving those tables alone (besides shuting off upshift TQM to "no") does not effect power at all. So far anyway.

  6. #6
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    I am having this same issue.. Putting the stock file didn't fix anything...
    "All that is needed for the triumph of evil is that good men do nothing..."

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