The shim/spacer/seal/gasket????? Between the axle head and the spindle there is a (i'm guessing) .03 shim. What is it? what's it called? And where can i find a pair? Napa, Baxter, and knetchs, all just srugged there shoulders at me. You can kinda see it just behind the head of the axle. Kinda where the guys left thumbtip is.