I am new to the forum and like this web site. I have been looking for posts related to transmission problems and have found a few. The trouble that I have is slightly different than others,that the car is shifting hard as a brick. It also wants to stay in high gear when coming to a stop. I can manually go through the gears and it shifts fine. Could this be some speed sensor? I think it has three. Is there any one sensor that goes bad before the others? How do you diagnose? I have had older E30's but all have been manual transmissions with no problems. If I have to replace the transmission is there any glitches I need to look for by converting it to a five or six speed?