Hello all. looking for advice. tore axle completely apart .except for rust and birfeild soup.came apart fairly easy. reassembly? the short shaft slid in really easy. a small twist and pop it was in. as for the long side, it seams it fight me. keeps hanging up on birfeild,to end of axle. locked solid. as if I need a bfh to drive axle in.whats up? what am I missing