except for the slight vibe coming from the back end that vibrates the whole vehicle and the local Ford Dealership won't do anything about b/c they say it's inherinet in the model! BS!!!
Similar vibe on my 08 SD, same story from the dealer(s). Adding a hellwig 1 1/4" rear sway bar kind of dampens the vibration by dispersing it through the rest of the frame, still there but not nearly as noticeable.