USA Standard Gear® is a trailblazer in offering top-quality OE replacement parts at budget-friendly prices. Our extensive lineup comprises the widest selection of aftermarket drivetrain replacement parts available, encompassing ring and pinions, axles, driveshafts, transmission, transfer case components, and installation kits. Going beyond standard replacements, USA Standard Gear caters to performance enthusiasts with the impressive Spartan Locker and Spartan Helical LSD positraction units. Designed with the general installer and DIY customer in mind, USA Standard Gear products ensure unmatched reliability, providing the confidence that your vehicle is equipped for the long haul. The Spartan Locker stands out as a rugged lunchbox locker, offering dependable, 100% lockup traction at an affordable cost. Notably, its design does away with thrust washers, adopting a revolutionary spring and pin design that simplifies installation significantly. When installed, it effectively replaces the spiders in a standard carrier case, delivering secure and reliable 100% lockup for enhanced traction. USA Standard Gear's commitment to quality and innovation has made us a trusted name in the industry. Our dedication to producing high-quality drivetrain components at affordable prices ensures that your vehicle's performance remains consistent, and you can hit the road with confidence. Whether you're a seasoned installer or a DIY enthusiast, the Spartan Locker is an excellent choice for those seeking reliable and cost-effective lockup traction for their vehicles differentials. Gear up with USA Standard Gear to experience enhanced traction and performance on any terrain.