I have a 87 jeep cherokee, with 4.0, aw4 auto tranny, and 242 t-case. When I put the transfer-case into 4-lo it works great for a little while, but when least expected the jeep revs up high and takes off, and brakes do not stop it. I throw it into neutral and it is okay, and I was just wondering is it possessed or is it just me, because when i went up that hill in 4-lo and it stuck on me I got pretty dang scared. Please help me with some info.