by KF5ZXT » Tue Oct 01, 2013 9:34 am
Should you decide that full width is for you, you can EASILY get both Super Duty axles for less than one JK axle. Either set is going to require you to buy new wheels, as they each have different bolt patterns than your current set-up. Now, not all Super Duty's have front and rear ABS, so you'll want to make double sure on the set you purchase (again, if you decide on full width). The 05+ all have 35 spline outer axle shafts, bigger ring and pinion, and bigger brakes than the 99-04 axles, plus they are already set up for coil springs (rather than leafs).
A good read here: