I have a 2006 Cummins and it has a mild built trans done with governed parts. I just noticed the other day when I put the truck in park it still rolls like the trans is in neutral? Also it has a TS shift master on it which I'm not a big fan of. I think there made more for trucks that will be racing because my truck shifts hard when I'm easy on the throttle but when I get into it it shifts a little smoother. So can anyone tell me why when I put my truck in park it still rolls like its in neutral and if the hard shifting is from the TS shift master? The truck has 123,000 miles and the only mod done to it is a straight pipe By the way I had the trans built in November of 2015. Thanks in advance