[rheavn]

The first step is to check the ride height on level ground. If you don't know what it should be & where to check it, then you need to call Newell and get some answers. Then check the ride height with the coach running. If low the ride height is adjustable. It would take one heck of an air leak to cause the rear to run low with the engine running.

I am not trying to say that the coach does not has air leaks, but not likely that air leaks are causing the coach to run low in the rear. The engine compressor puts out a lot of air that can cover most air leaks. Common Newell air leaks do not make the coach undriveable.