Yukon Gear Front 4340 Chrome-Moly Axle Kit For 79-87 GM 8.5in 1/2 Ton Truck and Blazer w/ 30 Splines

If you're working on a 1979-1987 GM 8.5-inch 1/2 ton truck or Blazer, this Yukon Gear & Axle front axle kit is built to handle the demands of a heavy-duty drivetrain. This kit replaces both the inner and outer axles on the front end, ensuring you have a strong, reliable setup for your truck or SUV. It's designed to fit a range of GM 8.5-inch axles, commonly found in vehicles like the Chevrolet Blazer, Chevrolet V10 Suburban, and GMC V1500 Suburban from the late 70s through the early 90s.

Yukon builds these axles using high-tensile strength 4340 chromoly steel, which is known for its exceptional toughness and resistance to bending or breaking under stress. The splines are cold roll formed, a process that strengthens the metal where it matters most for engagement. They also undergo advanced induction coil heat treating, a method that hardens the surface while keeping the core flexible. This combination of materials and manufacturing techniques results in a very durable axle assembly that can withstand the rigors of off-road use or heavy hauling.

This kit includes everything you need to replace both front axles. You'll get the inner and outer axles made from 4340 chromoly, along with Spicer 1310/760X Series U-joints. The inner axles are 30-spline, with one measuring 35.46 inches for the left-hand side and the other 19.15 inches for the right-hand side. The outer axles are 19-spline and measure 9.94 inches each. This comprehensive kit is designed for a direct fit on the specified GM 8.5-inch axles, making installation straightforward for someone familiar with drivetrain components.