lennon2009

Okay, this is more of a what if, then I'm doin it. Everyone knows that a six speed tranny gets better mileage then the four speed one does. Is it possible to change over to a newer six speed tranny for the extra gears and better mileage? How much would it take, computer, driveshaft, axle gears? Just wondering, myabe could find one at a junk yard with a decent amount of miles and trade it out, if there wasn't to much of a headache involved.