Adjusting transfer case linkage

[Destructo]

Can anyone explain to me the best way to adjust the linkage to my T-Case? I just rebuild it with new shift forks and plastics and a few other peices because I found lots of metal when I drained the fluid when I pulled my tranny for a rebuild. But anyway its works great now! Except I think the linkage may need a little tweaking, its popped out of 4-lo one time on me, but I just rebuilt the thing with every part it need, so I don't think the case is worn. I'm going off-roading this weekend and want to make sure I don't have any problems. It may have just been a fluke though, because I drove all over the mountains one weekend leaving it in 4-lo for 2 days and it never once popped out, so maybe I just didn't get it all the way in this once, what do you guys think?