Ok - thanks much for the suggestions. I have a message posted to Winnebago - in the meantime, I am going to attempt to remove the TV to gain visual access to the inside of the front cap. I suspect that something has come loose - and it is banging against the
Bottom of the front cap, which is right above the driver/passenger. I can accept that there will be rattles and squeaks, but this is especially loud, and since it is right above my head, especially annoying , Thanks again for your thoughtful responses!