Pulled the passenger tire, pried back the boot on the cylinder a bit, and brake fluid started leaking, so I guess the fluid on that tire was brake fluid from an existing leak. I took that axle out to inspect it, and it is in a lot better shape than the driver side was. There are 2 small lines that I can feel, but a nail doesn't catch on them, and it feels smooth overall. I'm going to lightly hit it with the emery and put it back in.
So in total I will be replacing the driver axle shaft with with the '96 axle, replacing both seals, both brake cylinders, and using new shoes/hardware on the driver side. The brakes on the passenger side still look really good. It's possible some brake fluid got on those shoes, but I"ll probably just wash them off with water and brake cleaner (unless there's a better method) and go with it. I've read people saying cleaning is ok, and others saying that they should be replaced.
Make sure you lubricate the new seal lips before you slide the axles back in or they will burn out within 50 miles.
Based on the TRQ/1AAuto video, I was planning on using Permatex Ultra Black RTV gasket maker where the blue arrow is, some gear oil (80-90) at the red arrow where it touches the axle, and then pour some gear oil on the bearings.
At the diff, I will use blue threadlocker on the bolt that holds the pin, and the Ultra Black gasket maker around the diff cover. Does this sound ok, or is there other/more I should do?
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Thanks to all for the input.