The good news is that while taking my rear diff out, I found that I didn’t actually break it.

Ended up stripping the teeth on the rear sliding joint PN: 705500528. Looks like all of the lube leaked out a long time ago and rusted the teeth away.

Now that the diff is out I opened it up to find that the seals were leaking. The ball bearings and sealed bearings both move freely and with no slop.

Already took the axle seals off. And will replace the main seal between the two halfs.

The pinion and ring gear look great. No pitting and slight wear marks.

So with all of this apart, are there upgrades I can do to the G1 (original version) gear set or pinion? Also what else should I replace?

Thanks