F-150s have used high-pinion front differentials for a long time, reaching all the way back into the '60s. High-pinion front diffs have two distinct advantages over low-pinion models: First, ground clearance under the driveshaft is improved by several inches. Second, the reverse cut of the gears is about 30-percent stronger when used in a front application. The latest F-150 uses a high-pinion Ford 8.8-inch ring gear in an aluminum housing. This one is protected behind Rize's generous skidplating. Although the Rize system does not require a snowball of other upgrades and mods to work properly, we would recommend regearing the differentials to compensate for the taller rolling stock that this kit makes possible.