Aluminum Locker Spring 90# Red

The Winters Aluminum Locker Spring 90# Red (part number 1280R) is a heavy-duty differential spring engineered for quick-change rear axle assemblies in performance vehicles. This 90 lb/in rate spring is specifically designed to work with Winters 10-inch and 8-3/8-inch quick-change differentials, delivering the spring rate necessary for controlled lock-up engagement and consistent power delivery during acceleration and cornering.

The 90-pound spring rate represents a critical tuning parameter for locker systems. Higher spring rates reduce spooling delay and provide faster differential lock engagement, which translates to improved traction and more predictable handling during aggressive driving. The aluminum construction keeps rotating mass minimal—crucial for reducing unsprung weight that affects suspension response. The red paint finish provides both corrosion protection and easy identification during assembly and maintenance. Weighing just 0.18 lbs, this spring integrates seamlessly into quick-change assemblies without adding significant rotational inertia.

This spring is essential for builders and racers working with Winters quick-change differentials who need to dial in locker engagement characteristics. Whether tuning for drag racing, off-road performance, or road course driving, the correct spring rate ensures the locker activates at the intended slip threshold. Winters locker springs are a wear item that benefits from periodic inspection and replacement, especially in high-horsepower or high-duty-cycle applications. This is a genuine Winters part backed by the brand's reputation in motorsports suspension and drivetrain engineering.