8-3/4 742 Gear Noise? Other Problems

I got the third-member out of my Duster, the pinion bearing near the ring gear is loose in the race. I can move it a little forward back side to side just by moving the yoke up and down. It looks like the nut for the yoke is not torqued enough, as there is no thread from the pinion showing (about flush with the nut). I assume this is why I also had the pinion leak (with what he says is a new seal), as the pinion isnt tight in the case. Would tightening the nut be the right next step?