The only time I've ever heard of a F53 "death wobble" is on this forum. I know my first year of ownership I was driving down to Florida and was just waiting for it to happen :S, because I read it on this forum prior. Since then my 96 F53 Cruise Master has hit just about everything it can over the years and never showed any signs of not taking it on the chin like the good coach that it is (for that buy in price.)
If the OP is concern, I would take it to a qualified big truck mechanic and have the front end looked at. More then likely something is worn, and has nothing to do with this well documented "death wobble" that has no recalls or class action suit that I know of.