I'm rebuilding my fron suspension and I notice there's some slop in the lower control arm, in the pivot point. I'm not talking about the bushing but the metal to metal pivot spot . is a 1/4" back and forth movement at the end of the arm acceptable? I don't see any way ro restore them, live with it or replace them I guess? I wonder if some type of lubrication should be used or would that just gather grit and make them wear worse?