Thanks Scott! I do have a Gov-Loc in a 9.5 semi-float in my modern pickup. I'll be changing the fluid in it soon...
When I open up the 10.5 before mounting it under my truck, I'll check the spider gears in addition to the ring and pinion and bearings.
And I'll change the fuild in it too, but I assume that's a given if you are opening it up.