I have a '95 cherokee and have replaced the stock motor mounts with M.O.R.E. mounts and of course I got a little more vibrations. This last month though at idling, I'm starting to get more vibrations that some time will shake the rearview mirror. It varies in the amount of vibration at each stop, sometimes it almost nothing to like what I stated before. It goes away when I put it into neutral. Does any one have any idea of what this could be? Thanks