Just an FYI;
The only time my '05 has ever been in the shop was for a "clunking" noise in the front end on sharp turns. It turned out one of my "auto locking" hubs decided not to auto unlock itself. The weird thing about this was that I had MANUALLY locked and unlocked them, because I knew I was in a place where I might need 4 wheel drive, so I didn't even rely on the auto lock. Oh well they fixed it and I've probably used 4X4 ten times since then and all has been fine.
Oh and welcome to Powerstroke.org Strokin'!