Bill called it correctly. Reposition the brackets, and torque them to spec. If you continue to have squeaks and grinds, lube the ball lightly, and lube the tabs on the trunnion bars (with Reese hitch lube or a little wheel bearing grease) where they fit into the ball mount. If the dual cams squeak, use a little vaseline on the surfaces to quiet them. The cams work on friction, so don't use grease on them!
AIR 2053 Current: 2006 Born Free 32 RQ Kodiak Chassis, & 1995 Coachmen B-van
Former Airstreams: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' Two-door, 1994 B190 "B-Van"