1984 K10 Transfer case leak?

[RShaips]

I just bought a very nice restored 84 1/2 ton for my son from a friend of mine. It is a 4 speed manual tranny. I got home and put it into 4WD and it started leaking out of the area where the front driveshaft goes into the transfer case. I doubt it was leaking at all until I put it into 4WD and made the shaft turn. I have never worked on this type before and it is not like my 72 which you can unbolt and change the seal. What is involved with changing the seal or whatever it takes to fix the problem. It leaks pretty bad. Thanks