Anyone ever experience a hard 2-1 downshift and trans data shows shift commanded and current shift going to 0? It is a totally random occurrence nothing I do can make it do it. It's not just a firm shift it's a bang into gear kind of shift. Bought truck with a bad trans, had a stage 5 Ppe done. Tried replacing pressure switch, shift solenoids and trim valves. guess my main question is could this be a setup error inside the trans or a tcm glitch? I've tried 2 used tcm's but it only seemed to change how frequent it happens. Thanks in advanced