not blue ox, but have had the same issue on my TT.
Have broken clips, the ball off the mount and trashed a bar itself... What is funny is I really don't have much sway as I have plenty of tongue weight and never know it till I see it..
I finally decided to ditch friction sway and have a dual cam setup to install on my TT this summer..
Bryan
2006 RAM 3500 MegaCab w/Cummins Turbo Diesel
Mopar Exhaust Brake
2004 Dutchemen 31BK