I was talking to a guy at a spring shop in town about my rear springs on my 1989 Southwind 30E. I told him the springs were almost flat with little arch (with no air bag). He said many RV rear springs...
I would call these people. They are great on RV chassis issues. The rear springs can loose some of the arc over time when rig is at vehicles max. I ordered and had variable rate front springs installed that did away with the air bags. change really helped handling. Henderson Line up Supersteer