C'mon, guys. Are we so used to this that we've forgotten all the poor trucks that were hobbled on the production line?
First modification on a 2000 DII: 2004 Center differential lock linkage. Period. End of story. I'm right.
Most of the transfer cases actually have the locker (some don't, but this is mainly contained in late 2002 and 2003 models), but they are not fitted with the linkage and lever to operate it from the cabin. It's like having heated seats, but a blanking plug where the button should be.
Buy the kit. They are available pretty much anywhere now.
Don't bother with armor or suspension until you get the damned vehicle working as intended, and using all it's parts. The car was delivered with a CDL. Don't fuck with anything else until your CDL is functional.
Only then; only when you've got that locker working, should you consider fucking with other things, and even then you should wait. These vehicles are very capable in stock form. Indeed, they are much more capable than even many enthusiasts believe.
Take it out with your bonus locker,
stock, and have fun for a while. Learn to drive it in that condition. A DII responds very well to experience. You've got to grow a hell of a lot before you hit a performance wall.
This is my DII, fresh out of the showroom in 2001:
I took it easy on the break in miles, but not too long after that, the highways ended. She had a bit of fun in pretty much every condition you can find. That was a bone stock vehicle, and I just pointed it at the horizon.
Rocks, mud, snow, forests, and long desert roads. Note the distinct lack of winch.
Get that thing out without mods for a while. You'll be better able to choose efficient modifications afterword. I wouldn't touch the thing until you've got at least a hundred miles off-pavement. I gave mine well over a thousand.
People fuck up when they rush into modifications.
While DII suspension is simply a phone call, a few hundred dollars, and a bolt-on kit away, it's not time for you to do it just yet. Wait. Learn the vehicle, and have some fun. While you're at it, sort out any issues related to the previous owner not giving it what it needs.
Cheers,
Kennith