[Richard]

Do you hear the noise if you turn the key to on, but do not start the engine?

Would you characterize it as loud, or just audible?

Is it coming from under the coach, like around the rear axle? The hydraulic cooling fans are under there and they are loud.

Bill’s coach has a bay at the right rear that has all manner of the Valid gizmos in there for slide seals. I have heard strange noises in that bay.