Originally Posted by '63GENIII (Post 7687660)

Welcome back. I have no idea what your t case is but I would start by finding out what kind of oil it uses and change that first. Note the condition of oil that you drain out. I had a T221 that was a stubborn shifter. Linkage looked good but for some reason would not be able to shift unless I got under the truck and used a small pry bar. The shift shafts would move very easily from underneath. If it has detent balls and springs that can be easily removed like on a 205, Id pull them out and see if it shifts easier with the detents pulled. If it does, clean and grease the detents. Thats all I can think of for now without pulling the case out.

Ive since swapped in a 205 and plan on cable shifting it. Got tired of messing with the Rockwell.

Originally Posted by RedRoad (Post 7702904)

I had a similar issue in my 72 K20, ended up being a combination is issues. Wasted front cab mounts, engine mounts, trans mounts and sloppy linkage. After changing the mounts I had to make sure the engine and trans were as far forward as possible which couldnt be held in place with the wasted mounts.

Now that the mounts are all replaced, the doors close and tc shifts like new.