Has anyone experienced (or heard of) problems with the transmission cooling unit? My 2004 Cayenne S developed a leak in the unit. The service advisor said that it was probably the result of something being kicked up from the road. Not sure how that can happen since there were no marks on the grill and there is a plate under the front end of the car. The stone or whatever would have to have the same charatersitics as the JFK magic bullet theory. At any rate, teh service advisor says that this probably will not be covered by the waranty[:@]