by changing it to auto would kind of defy the point of making it faster, but i can understand your situation. the best thing would probably be turbo or nawz. with an auto the throttle body doesnt close in between gears like it does when u use the clutch. but i must say, i have no idea for the auto tranny, q's usually come up on how to go from auto to 5spd, not the other way around. i hope my little bit of knowledge helped, but if it is in anyway possible, stay with the 5 spd