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The Yukon front 4340 chromoly axle kit for 1979–1987 GM 8.5-inch half-ton trucks and Blazers with 30-spline inner axles includes inner and outer chromoly shafts and 1310/760X series u-joints. Constructed from high-tensile 4340 chromoly with cold-roll-formed splines and advanced heat treating, the kit provides a heavy-duty direct-fit front axle assembly matched to GM 8.5-inch differentials.
Yukon Gear Front 4340 Chrome-Moly Axle Kit For 79-87 GM 8.5in 1/2 Ton Truck and Blazer w/ 30 Splines
