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...
Had same feeling about my Pace Arrow. took it to a local Truck axle and springs shop, they rebuilt the leaf springs and added an extra leaf to each side the ride feel totally better now the cost was about $200 Their comment was an RV use a truck chassis and the original springs do not hold up to the extra,s added by the RV builders