Our Newmar will groan when you flex the chassis, but it doesn't rattle when going down the road. yes you will feel the pot holes, wash board roads and the expansion joints. It doesn't accelerate like a dragster, or stop like a sports car. but they don't weigh 28,000#.
the rattles we do get are from the stuff in the cabinets, and a pesky screen door that we were required to add rubber cushions to the door stops. but not a peep out of the house structure, windows, or the storage compartment doors. At 60-65 on the highway you can not hear the diesel, but when it shifts down and pulls hard we can. it tows the jeep so easy you wouldn't know it was there with looking in the back up camera.
