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The Yukon USA Standard 4340 chromoly right-hand inner axle is a replacement shaft for 1979–1987 GM truck and Blazer front differentials. Built from high-tensile 4340 and heat treated for durability, it measures 19.15" from spline end to u-joint center, uses a 28-spline interface and accepts 5-760X series u-joints for a straightforward direct-fit swap.
USA Standard 4340CM Axle / 79-87 GM Truck & Blazer / RH Inner / 28Spl / Uses 5-760X U/Joint
