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

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

Quote:

---

Originally Posted by DVR IMP

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.

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

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.

I am having this same issue.. Putting the stock file didn't fix anything...