The spider I found in my roadster isn't terrible, but I'll use a better one if I happen to have it. So I've been opening up spare rear axles to see what's in them. So far I've found only one intact thrust washer. In today's patient on the operating table both thrust washers were long gone, and I wonder how long the T was driven without them. It had to be quite a while to make such a godawful mess.
Eight of the ring gear bolts are gone.
The condition of those differential case bolts suggests to me that somebody ignored the grinding sounds and kept driving.
The amazing thing to me is that the spider is about as good as the others I've found.
What did the ring gear teeth look like?
So many of those old axle housings served many years as trailer axles and never saw a drop of grease.
Not as bad as I would have expected from the rest of it.
This one was pretty well packed with a mixture of grease, dirt, and ground up parts.
The ring gear looks great, I put one much worse in the rear axle of a 3/4 ton pickup years ago, but I only put 160,000 miles on it before replacing it (the pick up not the ring gear)