Alright, I got this big thing out and started tearing it down to clean and rebuild. I haven't had much time to drive it since summer but am looking forward to getting it out again when the weather turns nice.
I took the front end off and started with the front diff. I checked the titanium nitride gears and saw some wear:
These gears will be replaced with new ones. I'm happy that they have held up so well to 8s-10s power on a 19lb buggy. I'll see if I can shim them any better this time around, but if the next set gets me through a season of bashing like these did, I'll again be happy.
I also checked my home-made extended front center driveshaft, and it looks great - not twisting, bending, etc:
If I have time this winter, I'll make a spare, but this one will go back in for now.
More updates to follow as I have time to tear down and rebuild.