I have had this issue for some time, and after replacing the factor skid plate with a Barnes I decided that it was time to address it. There some kind of fluid building up and dripping from the skid plate. The same fluid is partially covering the transmission pan. I have monitored the situation for more than six months, and I have no change in any fluid level. Could this be aome kind of condensation build up from an exhaust leak? The fluid has no smell, but it is thicker than water.