The Yukon Gear 4340CM Right Hand Inner Axle is a high-performance automotive component designed for use in 1979-1987 GM 8.5-inch axle applications, including Blazers and trucks. Constructed from high-tensile strength 4340 chromoly steel, this axle offers exceptional durability and strength for demanding driving conditions. It features advanced manufacturing techniques such as cold roll formed splines and induction coil heat treating, which enhance its structural integrity and resistance to wear. These features ensure the axle delivers reliable performance, improved longevity, and increased resistance to stress and fatigue, making it an ideal upgrade for heavy-duty or performance-oriented vehicles.
This axle is specifically designed to fit 1979-1987 GM vehicles with an 8.5-inch axle and uses a 5-760X U/J for proper connection. It serves as a direct replacement or upgrade for stock axles, suitable for street, off-road, or towing applications where strength and durability are critical. The part number YA W39252 ensures compatibility with the specified models, and installation typically involves standard bolt-on procedures. This component is perfect for enthusiasts seeking a high-quality, reliable axle to enhance vehicle performance and drivetrain resilience.
