Hey scotty i just wastched a genious and really easy way to check for ground problems u posted. First off thank u brother! I have a 2003 ford ranger 3.0 2wd edge. My bro in law drove it n said it would hesitate sometimes but with a quick twist of the neg cable all would be well again. I bought it n replaced the end but didnt cut the cable back, but rather just cleaned it. I got a feeling ill find the other end of the cable is also ugly. Also the tranny was over filled a half quart which i immediately siphoned out. Prob due for a flush but not too bad via rag test. Can a ground problem affect shifting? The way it acts could be engine not pulling or tranny not engauging and its rare. I havent yed did the ground check. But is auto trannys also controlled with electronics that could be affected? I put it to the floor it spins tires and gets moving. It only does this at low rpm under little stress. Thanks!