Wheel bearings and hubs failed on both front wheels of our RV. Our current mileage is 38500. According to maintenance service is not required on the bearings until 60,000 miles. At that time bearings are to be regreased. At 150,000 miles bearings are to be replaced. The mechanic that did the repair work informed us that we were lucky the front passenger wheel didn’t fall off. I understand that the Ford F53 chassis has encountered this wheel bearing issue. We have filed a complaint with Ford with pictures and detailed information of the work that was done to both of the front wheels. The only indication we had of this issue was intermittent vibration in the front end (as if you were riding over a rumble strip). Also, the ABS light came on and then went off. We were driving from Maryland to Texas and on the last day of our trip about 100 miles from our destination is when the vibration first occurred. Upon arrival we tried to contact Ford dealerships in the Abilene, Texas area. None of the dealerships contacted would service our RV. We then contacted an independent truck repair shop who diagnosed and fixed our RV. Total cost was just under $8,900. The parts were very difficult to find from Ford. Ford said that many of the parts needed were on back order and wouldn’t be available for more than a month. According to the maintenance schedule this issue should not have happened. We feel there is a major issue with the Ford F53 chassis wheel bearings and a recall should be issued by Ford due to the dangerous conditions it creates.