Just picked up an '82 with a 14 bolt FF. I've got a problem with the axle seals not sealing on the differential housing. Looks like some grit got between the lip of the seal and the wear surface on the housing resulting in a few grooves. I've repaired this problem on some of the larger trucks and trailers by installing a thin sleeve over the wear surface. Does anyone know if one of the seal manufacturers sells anything like this for the 14 bolt differentials? If so, how much would I be looking at and where can I find it?