Removing the front driveshaft is not an option.
Trying to install a 5 speed will not even come close to offering you an increase in gas mileage that is worth the hassle. Figure out how much you'll spend in fuel, and decide if it's worth it to you. If not, you may consider the H3 coming out in a little over a month. It's a little smaller, but gets almost twice the gas mileage.
|