A: That's 2mpg highway cruising. In town makes no difference. When I put 33" tires on my Comanche, I lifted it 4 1/2" and put the 4x4 front axle in. With 3.08 gears and the BA 10/5 trans, I went from 18 mpg to 23 mpg because I was almost totally freeway crusing (150 miles a day to a low paying job. Now I make more and drive 2 1/2 miles, mostly downhill, to work) I now have 3.73 gears and my mileage dropped back to 18 mpg hwy. From: adh@xxxxxxxxxxxxxxxxx (Sandwich Maker) To: mail@xxxxxxxxxxxx Subject: Re: FW: Jeep 4.0 in an American? " From: "Jim Blair" <carnuck@xxxxxxxxxxx> " " A: The fuel economy difference is minimal. Maybe 2mpg. 2mpg is almost 10% isn't it? " The D30 hub kit i$ " expen$ive and a much easier way is pull the guts and axleshafts from the " front and undo the ujoint at each wheel and put the stub shafts back in. The " housing weight difference will be @25lbs that's a good thought. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought