I have an '11 6.7L F-250 w/167K. The "auto" function of the front hubs quit working as there was a vacuum leak. Tracked that down to passenger-side front hub. Had the upper/lower ball joints done and the vacuum leaking front hub required an all new lockout, apparently it came out in pieces. Driver's side was good and got new O-rings, both corners got new U-joints, alignment, $2100.
I have owned the truck since 100Mi. Got a new radiator and EGR valve under warrantee @ 80K and 90K give or take. My AC will still freeze you out. Brakes right around 100K. My idle time stays a pretty steady 21% of total engine hours. I changed every fluid the truck has as well as the serpentine belt @ 130K. 5K mi oil changes, 10K Mi fuel filter changes. Engine and transmission run like new.
You can check idle hours, and I would. Exhaust-related issues are the only you're likely to encounter and idling is a good indicator.
