|
I did the same swap in my old Volvo turbo wagon for better mileage.The automatic a non locker, had a .69 OD and 3.90 rear gears. The manual had a .80 OD and I also swapped in 3.31 rear gears.
Highway mileage the best I could get with the automatic was around 340 miles per tank, 15.8 gallons. After the swap including lowering the vehicle I jumped the mileage to 425-440 miles per tank.
Almost always the best bang for the buck mod for better mileage is swapping out the automatic for a manual and higher rear gears.
|