Recently, my car had been having issues with the transmission shifting harshly and slipping gears, etc. Anyway, we decided to replace the transmission in my 2000 323i with a used/rebuilt transmission. When the shop installed the transmission that we got and put the car into drive the car went backwards. :banghead: After double checking some things the problem was determined to be a faulty transmission so we are on the search for another transmission for the car. My question for you is: what is the best place to get a used Automatic 5 gears GM transmission for my car. If you need any more information just let me know and I will do my best to explain.