We had a two foot snow here this week. I just noticed a hose hanging. I think it is a vent hose for the front Diff. I blew in it and got the taste of gear oil back. It has a metal clip on it, but i don't know what it is supposed to clip on to or where the hose is supposed to route to. right now i have it clipped onto and stuck inside the frame rail. so two questions. 1) where does it rout and clip 2) why doesn't the rear diff have a comparable vent hose?