Hi Don, could you expand on this? By bang are you talking a sever slamming in and out of gear, or a more "skip" like type of "bang back in". This feels like it could be jumping out and back in, but it isn't an earth shattering bang. You can feel it in the floor, see the O/D jump a bit when it happens, and obviously hear it. It sounds like something could be either skipping or slipping. And BTW, it does not do it in reverse. Maybe the forward gear is worn? (if so I replace forward and reverse together right)? Thanks for your time and effort in teaching a novice.-Jeff