any body with a 3500 dually hauling a good size 5th wheel are you sitting on your overload springs. I'm debating on getting springs rebuilt or bags. I think springs are fatieged fro years of towing and torquing it up with a 1000 fp of tourqe. Axle wrap is pretty bad truck hopps trying to get camper moving with a six speed.

 

Mine will just touch the overloads with the 5er empty, I also have an all steel flatbed that is skirted with under body tool boxes so I'm just a bit heavy to start with