So driving the rig for a couple of months, I had a slowly increasing vibration in the rear end. I had been operating under the assumption the rear end (8.25) was going out, but I started noticing puddles of ATF when I parked. Not cool.
It turned out the bushing the rear yoke rides in was totaly shot. I could move the yoke .120-.180 side to side in the housing. Did some reading here, found the part numbers, ordered a bushing and seal and tore into it.
After draining the fluid, the tailcone is 6 bolts and slides off pretty easy.
Drive the old bushing and seal out of the tail housing.
Reverse the process
If you do this, watch for this oil line, which apparently likes to fall out and not be noticed, causing you to pull the housing back off and install it again.
If anyone needs to do this, the parts came from transmission parts USA:
760-000076635 76635 A340 AW4 A40 Transmission extension housing bushing. (38 MM) 1 $2.94 $2.94
940-000094401 94401 Jeep AW4 Transmission extension housing seal 1987-on. 1 $3.70 $3.70