recently it seems like my VX has been rolling more when I put it in park and on any type of unleve surface. I have to watch and others have commented when steping out, the truck moves after in park more than it used to. What could be wrong, is this normal with wear and age (slop in the driveline)? Joints, shafts, etc. all are fine. Can anyone measure how much (horizontally) there VX moves while in park?