i have a 97 cavalier with a 2.2 automatic. i was wondering if i could put a newer model tranmission in it. such as a 2003 4 sd auto. to get better gas mileage. the tranmission i have now is bad, or how hard and what would i have to do to put a 5 sd stick in the automatics place? the tranmission i have now is bad, and i need a new one any ways