Drives when in Neutral. B&M shifter

you know after reading Trailbeast's post, I thought of something. When you get a B&M shifter it comes with a new shift selector arm for the transmission. It's length matches the shifter to ensure that a shift at the shifter only moves you exactly one gear. If the previous owner skipped this step and just used the stock arm, this could be your problem. If this is the same arm from B&M that they use in a Star Shifter, I probably have one that you can have for postage.