I have a 97 limited zj with a 4.0 and everything on it is stock, stock differentials transfer case and tranny. The tranny has 190,000 miles on it and looks like it has been overfilled and maybe serviced once in its life. It is my daily driver and i try to keep it tuned up as much as posible. Heres my problem, so today i was sitting in SLOW traffic on my way to work with o/d on. Everything was going fine until i push down on the gas and i hear and feel my car start to stutter. it feels like its getting stuck and trying to punch its way through and after taking the gas of and going back on the gas it runs fine. it runs fine in normal traffic and doesnt give me any problems. My car also stuttered back from work when i was on my way home after pressing halfway down on the gas pedal. recently though ive noticed that sitting in the middle of an intersection waiting and creeping to turn my rpm gauge will go down to 250rpm quickly and shoot back up and run normal. If it helps any i use my o/d button alot. please help!