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Thread: 4L80e - ECM commanding D4 shift pattern, without a DTC?

  1. #11
    Joe (Moderator) joecar's Avatar
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    Glad you got the segment swap working, let us know how the COS upgrade turns out.

  2. #12
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    I ended up doing the COS upgrade on the "confirmed good" segment swap, then did the segment swap again into the tune I started with. It works like it should! Now I can get back to actually tuning it! Thanks for your help.

  3. #13
    Joe (Moderator) joecar's Avatar
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    Good job

    Let us know how your tuning goes.

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