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Thread: 2 bar os with 6l80 issues

  1. #1

    2 bar os with 6l80 issues

    I have a turbo C6 grandsport here that I am tuning. I had the car running in sd on the stock operating system. Now we are raising the boost a good bit and I switched to the custom 2 bar. After doing so the transmission will not shift properly. It skips 3rd gear and the tutd will not downshift anymore. Obviously I'm missing something that I need to change. I have done a lot of 2 bar os on these pcm's but this is the first I've done on an auto car. I'll post files as time allows.

    BTW when I flash the stock os back to the car it works flawlessly.

  2. #2
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  3. #3
    Started over with base file and it?s working now. Guess i fat fingered something possibly. Shoulda tried this before posting. All good now