4WD hub

[Fingers]

So, I changed the ball joints in my '86. Now I can't seem to get the hubs on all the way. I made the special tool, torqued to specifications. So the lock nut should be at its proper depth. I just cannot seem to get the hub on deep enough to get the snap ring back on. Am I missing something here? Maybe it's the axle stub not seating properly? The FSM is very unclear on this procedure.