I have a 91 ford escort lx automatic transmission. i noticed that there is no noticeable difference between drive and overdrive. i had a 95 and there was a difference. I don't have any other transmission problems besides a acceleration issue but i believe that is just a bad injector. Anyone have any ideas, i read the codes just a air temp vane code and i just replaced it. Also i know this has nothing to do with the topic but does anyone know the size of the gas tank that this year and model has. I have researched other problems with other cars and they say computer.