transfer case repair/replacement?
New to the Jeep community, please forgive my lack of experience.
I picked up a 92 YJ (2.5L 4cl/5sp), all stock (my first Jeep ever!) about a week ago as a daily driver/running project. It runs great except for the fact that today the transfer case started making noise like the chain is slipping. I put it in 4wd for the first time today to get through some snow, then drove in reverse for a bit to ensure 4wd was off. Dirveability is the same as ever. The 4wd light is (and has been) stuck on all the time, but the Jeep itself is definitely in 2wd (when up on a jack, front wheels spin freely by hand). I've already ordered a Posi-Lok setup to replace the retarded (and evidently damaged) vacuum system.
Anyways, I'm concerned about the noise from the transfer case. It sounds like the chain is slipping over worn gears, though only in low rpm range (esp. starting out in 1st gear). It drives the same as it has since I've owned it. I assume this noise is not normal or desirable, but is this a common occurence, and/or one I can live with? I'm going to change the fluid in the transfer case tomorrow and check for any major chunks of metal, does anyone know if there's anything in particular I should look for?
This forum seems to have a lot of great advice from a lot of experienced Jeep owners. Can anyone tell me if simply servicing the transfer case will postpone the need for replacement, or should I just swap the thing out? I don't plan on doing any serious 4-wheeling until this coming summer, so having 4wd isn't critical for now.
If I need to swap the transfer case out, could anyone point me in the direction of a semi-detailed how-to guide? I've searched the forums, but can't seem to find a transfer case swap thread aimed at someone who's completely new to Jeeps. I'll be doing the swap myself, in my driveway, in the snow. I won't have the funds for a new/upgraded T-case until summer either, so I'll be doing a straight stock to stock swap with a junkyard replacement.
Again, any help at all would be appreciated. Thanks guys