I have this problem too, I haven't gotten it diagnosed though yet. Only happens certain days and not others. Is 280 just the part?
Would this be covered under warranty?
The earlier issue was due to a bent axle right LD? I had the same thing happen and most recently have devoloped a squeel on slow moving braking. Wondering if I'm having the same issue (AGAIN). Once diagnosed, Let us know the culprit