I understand that the transmission fluid needs to be changed every 30K miles or so, however I bought this car last year and it sat through winter. I've put as little as 6K miles on it and just recently changed the Transmission Fluid in it (yesterday), when I woke up this morning to drive to school, my transmission would not upshift at all unless I over revved the engine by quite a bit. Im wondering as to whether or not my transmission is save able or not. Any input is greatly appreciated