8 1/4 axle inspection.

Pulled cover off and looked inside. One thing I found right away is there is no preload on pinion. The nut is tight and there is no play but it spins with no resistance. The carrier backlash was about right. There was very little run out. I am gonna pull the carrier and pinion today. Looked at gear mesh and they looked like they were running too deep to me. Should I worry about that now or try see what's going on with pinion?