You are correct. Most north america 02' center diff do not have the ability to lock. That being said, I would still crawl under and see if a PO had converted it.I believe that if it was built prior to 2001 it does. My 2001 has a build date of December 2000. And I have the nip and a cdl cable hooked to it
You're a D1 guy, no wonder your asking.This is on a truck I'm looking at buying. It's a one owner '02 with 89k miles. I'm sure the Tcase is original. The owner doesn't have e a clue. I asked him if it had a locking transfercase and he said he thinks so, "it's a beast I'll the snow". Meanwhile I can see the TC shifter in the pic is not for a locking one.