I have a 95 Chevy k2500 14 bolt I replaced the shoes on both side the rear passenger side has no issues. I replaced the drum on my driver's side because the old drum is scored and thinner, I bought a new one and can't get the drum to seat fully on the top half even when spun the lower 2 lugs on the drum wobble and seat fully. Old one does the same but is worn down and doesn't look as drastic of a gap at the top. What would cause this, bearing or?