As far as I can tell (based on image in this post
post6668129.html?hilit=rear%20seal#p6668129) it doesn't looks like its the rear main seal. At first I thought its the trans but after the dealer checked it, they said its the transfer case. They got it done in about 4 hours.
I will keep my eyes on the parking spot and make see if there is more leaks (that dealer miss). Hopefully not.