Gary, I bought a 2011 F250 a few months ago that has the 4X4 Camper/Plow/FX packages. It rides well loaded and unloaded unless I get on some very rough pavement and then it's not good. I'm new to a fifth wheel but what mine does I wouldn't describe as chucking. It's more of a front end thing and is distracting. Does yours do the same thing when unloaded?
I'm thinking that the 4X4 Camper/Plow/FX packages make the front end too stiff for mine and is causing my problem but we may not have the same problem.
