Trying to put together a 28 spline pinion on a ford 9 inch. All new with strange center support i think it is the N1917 (black forged aluminum one.) When you tighten down the pinion to get the preload you need the nut still has threads showing. Seems like the 28 splint yoke doesn't want to go far enough down... The yoke is the only used part but is this normal? I though the top of the nut that is not yet engaged is what helped hold the nut on cause it is deformed...