I've got a 98 Ranger thats been in Mi it's whole life but has very little rust. I've noticed lately that the front of the box has been bouncing. So today I pulled out the bed liner to discover the 2 front bed bolts are no longer attached to the box as the box had rusted all the way around them. So I cut out the rust and redid the steel in those areas. Is this a common problem? RB