We have had this rattle on the roof since we bought the coach..
the jack antenna rattles like crazy on roof inspection... oh and whats up with no ladder on some of the new coaches???
any way... the thing was way loose to me so I started taking it apart...
seems who ever installed it over tight'n the inner shaft and broke it...
so the only thing keeping it form blow'n away was the nob on the inside...
if it would have blown off we would have had about a 2 1/2 hole in the roof
the whole thing is plastic...