Okay, I have a 1987 GMC Jimmy that I rarely wheel, and when I do, it's nothing but just little mud bogs, crawling over big logs, and simple pu$$y stuff. I'm sure I'm gonna get crap about all that, but anyway, when I engage my truck into 4LO it seems to randomly pop out at times. When it's in 4Lo, and I give it gas, it lags real bad like it's not engaged, then finally kicks in. Also, when it pops out, as I try to put it back into 4LO or up into 4HI, it grinds really bad and forces the shifter right back. Sometimes I have to actually turn the truck off to shift it from 4LO to 4HI or 2HI. The model of transfer case on the truck is the 208 C 2 with a freshly rebuilt 700R4 transmission. If anyone can give me any advice or diagnose my problem, I would greatly appreciate any help. Thanks in advance guys.