I contacted the Vender, they stated that it appears the operator mechanism on your MaxxFan Deluxe Roof Vent, # MA00-07500K is bad and needs to be replaced. Use the Replacement Operator Mechanism for MaxxAir MaxxFan Plus or MaxxFan Deluxe Roof Vents, # MA10-20281K-1AF. view full answer...
If your brakes are still good you can just replace the hub and drum assembly. What you should do is check the drum and try and see or feel if there are any grooves on the inside of the drum. If there are then that would be the issue and you would need to replace the assembly. Based on your previous info, a 5,200 lb axle with Bearings # 25580, # LM67048 and Grease Seal # GS-2250DL, you will need the Dexter Trailer Hub and Drum Assembly - 5,200-lb Axles - 12" - 6 on 5-1/2 # K08-201-97. view full answer...
That sounds like loose lug nuts. Which if you didn't retorque them after driving on them for a little bit they can work themselves loose. view full answer...