The ball joint on the drivers side fit fine, but the passenger side is about 1/10" less engaged so the cotter pin hole is blocked by the castle nut with the washer. If I remove the washer it works. Is the washer necessary, or should I get a thinner washer? I pushed the boot out of the way to get a look from the top, and it's definitely fully seated. SN95 spindles if that matters. Thanks.