Okay i have a 88 jeep cherokee base 4.0l I6 4x4 and when i put it in drive it feels like the passenger rear is locking up, but when i put it in reverse or neutral nothing happens but it only happens when i put it in drive or when im facing down hill in neutral but not when im going backwards in neutral. If anyone can help me and point me in the right direction i would greatly appreciate it.

 

Rear brakes, start there

 

alright you think they are probably locked or to tight?

 

Or a spring is broken allowing the shoe to wedge against the drum in one direction. Could be a lot of things. As mentioned, start by inspecting the rear brakes for anything that isn't right.