The Yukon 4340 chromoly left-hand front inner axle is a Dana 44 replacement for 1980–1992 F150 IFS fronts, measuring 15.7" long with a 30-spline end. Built from heavy-duty 4340 chromoly and produced with cold roll formed splines and heat treating, it accepts 5-760X series u-joints and serves as a rugged direct replacement for worn inner shafts.
Yukon Gear 4340 Chrome-Moly Left Hand Replacement Inner Axle For Dana 44 / 80-92 F150 IFS Front