So trans and tcase is in the truck and i got it to move this past weekend outside the shop. YAY, well right after I rebuilt it I tested operation and it worked, now after it setting awhile then finally getting put in, it works but only in one gear, I dont remember off the top of my head if it was 4x4 high or 4x4 low but definitely 4x4. Im guessing something got seized inside form it setting and me not being proactive and moving the gears ever so often to prevent this... So with it installed and fluid in it, i guess i can just keep trying to rock it back and forth and hopefully it frees up? i did see the 4x4 indicator switch sometime seizes up to so i might remove that aswell. Any advice or tips if anyone has come across this before, again this is a fresh rebuild - new everything... 

Does it just free spin in the positions it doesnt work?

How's the adjustment on the shift lever beside the t case under the truck? In the right place? Tight?

Yea, it works, I drove it out of the shop this weekend. I removed the linkage out of the equation even though it's good and didn't move anything and used my hand to try and manually move the lever forward or backwards. I can get it to partially engage either way... 

Just got home and gonna see if I can get it to move by just moving it back and forth to see if It is froze and free it up or see if something else is going on... 

You might have one of the forks flipped around, I'm just guessing here as I have no idea what you did to the inside of it

Well I'm super happy to say that it works now. I just went back and forth in my long drive way kinda getting stuff moving again and I was able to get it to shift into all ranges. Guess from all the sitting it did after the rebuild it just kinda seized a little... just needs drove now...