Aluminum Locker Spring 78# Yellow

The Winters Aluminum Locker Spring 78# Yellow (part number 1280Y) is a precision differential spring engineered for quick-change rear axle assemblies on performance vehicles and drag racing platforms. This 78 lb/in rate spring is designed to work with Winters 10-inch and 8-3/8-inch quick-change differentials, delivering consistent spring force in locker applications where reliable engagement and disengagement are critical to differential performance.

The 78-pound spring rate provides moderate resistance suitable for street-driven vehicles and moderate performance use, balancing locker activation with drivability on varied road surfaces. The yellow paint identifies the spring rate at a glance, a standard coding convention in the quick-change differential industry that simplifies maintenance and parts verification. At 0.15 lbs and compact dimensions (2.45 x 1.35 x 3.05 inches), this spring integrates seamlessly into standard quick-change housings without requiring modifications. Winters' reputation in the drag racing and performance automotive sector is built on precision manufacturing and consistent quality control—factors that directly affect locker function and longevity under load cycling.

This spring is intended for builders and technicians servicing Winters quick-change differentials in both competition and high-performance street applications. Proper spring selection ensures correct locker bias and engagement characteristics; using the wrong rate can result in premature locker wear, inconsistent traction, or delayed engagement during acceleration. The Winters system is widely trusted in bracket racing, nitrous oxide applications, and forced-induction vehicles where controlled traction is essential to consistent ET and reliable performance.

Quick-change differentials have become the standard in organized drag racing and high-horsepower street builds because they allow rapid gear swaps without breaking down the entire axle assembly. The spring's role in controlling locker engagement cannot be overstated—correct spring rate directly influences how smoothly the vehicle launches and how predictably it tracks through the run. This individual spring replacement is sold as a single unit, allowing targeted service of worn or damaged components without unnecessary parts replacement.