7.3L Power Stroke Technical Info
'01 F-550 2wd with 7.3 and auto. stock dana 135 has gear ratio of 4:88. seems that pinion ring and gears are only able to change to 5:3*. would like a 4:10 or better. question is: what other axles or vehicles can I swap axles with for a better fuel milage vehicle. Love the truck, only 150k on...