Chris - 

The bevel teeth on the pinion shaft are all good.   The two in the pictures are the only chips.

I probably won't be plowing 10 hours a day with it, but do plan to use the tractor on the farm.  I'm going to go ahead and check on prices and availability of the ring gear.  I've gone this far with the rear end, and still have it opened up, I probably ought to finish it and do it right.....   unless John S thinks otherwise.

Thanks.

Ronnie