Hello everyone, great forum here! I have searched all over the forum, got some info but no one seemed to have this exact problem. I just bought a 98 cherokee 143k mi with AW-4 and NP242 t-case, I tested everything out before I drove it home and it checked out. About a week after I got it, I was getting into some mud and put it in part time 4wd then I hear a grinding noise and the front wheels arent spinning. I stop, put the tranny in neutral, then back to drive and the 4wd kicks in right away? I took it back home and adjusted the linkage and after that it seemed to go in and out of 4wd part time/ full time and 4lo just fine. Then, today I took it out in the mud again, shifted into part time 4wd and I got the same grinding noise? It sounds like its not quite engaging 4x4, but if I shift to N then back to Drive it always seems to go in. It also has the same issue when shifting back to 2wd, it takes a while and/or shifting from N to Drive to get it to disengage. This Jeep was a DNR vehicle so I'm thinking it didnt see 4x4 most of the time, maybe I just need to break in the t-case and use 4x4 more often? I checked the t-case fluid level, it seemed to be fine. I dont know what to try next? Thanks for your help, zach