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LOL!!! Standing by Rick, standing by. I think that linkage I am referring to is the HI/LO Range Shifter. Oh, and take your time, I am done for today (after all, I really am an Old F---!).
Hopefully that tool works. I honestly thought they were the same size shafts. If that doesn't work you may be able to pick the old one out and use an appropriately sized piece of pipe and ample lube to push a new one in. Otherwise if you have to split the case you mind as well rebuild it at that point.
The front driveshaft could no longer articulate, and bend and it pushed back hard, and somethings got to give. Let the transfer case hit the road. I was still able to limp off the exit and used an M1009 to pull the truck home. Anyway, here are the 2 shift seals. They are different. This is the transmission. 
This is the transfer case. 
The transmission seal was simple to remove because I had the shifter out of the case. 
You can see the tarnished
abrasive area that the dirt formed on the shift rod. I used the open end 13mm and pulled the seal. 
I will write and clarify this later. I have been thrown off and on 5 times in 5 minutes. I don't want to start over again.
Thank you. Bank health and weather permitting its going to be completed.
. After some searching, I believe that these are the seals that go onto that shaft:
And by the way, this episode on ! 81 was back in the late 1990's and 3 AM. I wanted to show you also that if you are changing O rings you may as well change the front out put flange seal. 
This transfer case is still full of lots of great parts. Parts are parts. Hard to find parts at the time when you need them. 
OEM NP208 from a CUCV 
Another thing I had issues with is clogged vents from being over the rockers in slop and muck. The vent tube. 
This one is cracked from age. And when you get the transmission over hauled always request it be changed. It is flared and barbed and comes in from behind the front cover. 
I have had a few that had a serious leak in the rear section. This was caused by throwing the gear selector in PARK while moving. That required a new transmission case from being cracked. This is the PARK pawl in the case. 
I tried to get this out to show you but gave up. This transmission came from a CUCV. It was one I bought restored and sold years ago. It may be yours. Check out the VIN last 8. 1986 pickup not sure if M1008 or M1028 but 1 of them. Free prize for you if you have this truck. I will send you the OEM case for the transmission. On your dime of course. Take Care and have a Great Day.
Very easy to get out with the selector rod removed. Not so easy with it still in place. I can't imagine trying it with the transfer case in the truck. Remove it save the violence and cursing. 
and as I mentioned the shift shaft has irregular corroded and worn surface on it and I hope a seal and bushing fix it. Probably will but not 100%. 
Again the output seal 1 1/8" socket for the nut that holds the 4 bolt flange on the shaft. Use a 28.575 mm socket if you can find one. Some genius told me the transfer case was all metric. I agree for the most part. But the 1 1/8" has worked for 30 + years. 
And do the job right clean and lightly polish the surfaces that you are going to attempt to reseal. This is not ready to be installed. Clean it well and do it right. 
3 prongs hold it in the case. The transmission pan must be off to gain access. 
O ring
And just a parting shot of the transfer case output shaft with the splined rubber that I think is a thread sealer. Hey man Nice shot. I heard Joan Jett will not sing "hit me with your best shot" anymore. WTF? Oh well. XM still plays it.
Looks good Gunny. What type of paint did you use on the skid plate?
I'm a fan of Rustoleum so it's Rustoleum automotive primer with Rustoleum Proffessional Black Enamel.
