My 2005 Santa Fe is leaking oil out of the transfer case at 21,000 mile so the dealership needs to replace the entire transfer case. This seems like a really bad thing at only 21,000 miles . Can anybody give me some insight on this? I'm thinking about trading it in if I'm having this kind of problem with such low mileage. Is this something I should be concerned enough about to think that maybe I got a lemon and should trade it in to a newer model? Thanks in advance for all responses