Ok ive had my B&m shift plus on my 4t40e for like 2 years now. Funny thig is that 2 years ago the directions I used were diff from the ones found today (by one wire) and the kit worked about 50% of the time. Well i installed one on my girls car and that made me realize mine was wrong! So I redid it using the new info and WOW, it made a hug diff. But now it it not nearly as dramatic, the car does not have any problems shifting and it shifts hard on the 2nd setting but in first it seems to have faded out. Did my car get use to it or something?
Could you post me a picture of where you have your wires hooked up and how you hooked them up? I am having a problem and don't know where to hook mine up for sure.