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The Yukon 4340 chromoly axle kit is a Dana 30 front axle replacement for Jeep XJ, YJ and TJ models, built from heavy-duty 4340 chromoly with cold-rolled splines and advanced heat treating. It includes inner and outer 4340 chromoly axles and Yukon Super Joints—two 30‑spline inner axles and two 27‑spline outer axles—supplied to fit Dana Spicer 30 front differentials with the appropriate u‑joint hardware.
Yukon Gear 4340 Chrome-Moly Replacement Axle Kit For Jeep TJ / YJ & XJ Dana 30 / w/ Super Joints
