489 Gear noise and an odd thing I noticed

Update: I think I found the source of my gear noise. Insufficient carrier bearing preload. My fault when I did the locker install. Pattern looks alright

Picked up a solid crush spacer and it's too long. Got another one, a machined one, on the way from Dr. Diff. Crossing fingers.

Rotating pinion torque was 0 in/lbs so I'm wondering if it that was contributing too. Under torqued pinion nut?