My car feels like it is slipping a little and when I shift gears it hits into them pretty hard. By shifting gears I mean like from reverse to drive. U can hear it hit. But my friend who had two trans ams before me said my car is shifting at to low of an rpm while driving. From first to second it is only at 4500 and he said both of his shifted at 5500. I don't think this is a trans problem so much as a computer problem. But I just wanted to know anything about either of the problems....Thanx for any help