the hub seal I am referring to is not on the lock in lock out but on the actual wheel hub to knuckle at ford this part is approximately $3.00 the large axle seals are aproximately $30.00 a piece and the smaller ones are $14.00. I do appreciate any info that you or anyone else has. Would you or anyone else know if I unhook the vacum lines at the nipple on the axle housing and hooked it up to a vacum gauge what type of vacum should the gauge show.