Ok, assuming you tried to shift into 4wd in Neutral, get a can of any lubricating spray, crawl under your jeep, on top of your skid plate sits your tranny/transfer case. Spray all the linkage parts well with lubricant( I mean soak'em) If that doesn't work, I would go see a mechanic. Sorry if this doesn't help alot, I'm a shade tree mechanic.
Thanks for the quick response. I'm a newbie shade tree, but my expertise is limited to Camaros. I started under the Jeep and got to the skid plate, but got distracted. Will try tomorrow and let you know how it comes out. Hopefully its a quick fix like you suggested. The guy that I got the Jeep from never put it in the mud (and I believe him and the bottom of the Jeep shows it, too) and hardly, if ever, used the 4 x 4.
I forgot to say that when I shift into 4L the transfer case makes a little scratching noise like its trying to engage. Anyway, I'll let you know how I come out and thanks again. Alvin
Has your jeep been lifted? If it has, you might need to look at an extension on your 4wd shifter, lifts can cause them to bind an miss the 4wd gears. Not sure, but you may also be able to adjust by fiddling under where shifter goes through the floorboard.
It sounds like the linkage between the shifter and the t-case is out of adjustment. The easiest way to do this is to push the t-case shifter all the way forwards(2WD). Underneath there is a box like clamp with a rod going through it that is connected to the t-case at the other end. Loosen the bolt on the clamp and then get back in the jeep and push the shifter forwards till it won't go anymore. Then get back underneath and tighten the clamp back up. That should fix the problem, if that is what is wrong. Lube can't hurt either.
Looks like the lube was a good start. It actually engaged the 4 x . However, it would jump out unless I held the shifter in place. Got some additional feedback about the t-case needing adjustment...gonna try that next. At least I feel better that I don't think it's anything that I can't handle or cost more than a couple of bucks to fix. Thanks again for your help.
Thanks for the info...you are probably dead on about the t-case. After I tried the lube, I could get the 4x to engage, but I had to hold the shifter otherwise the 4x would disengage. Looks like I might need a rear seal, too, so I can take care of both of those and hopefully update my profile and get some pics of my ride posted, soon. Thanks again.