Detroit Locker - GM 10.5 14-Bolt

The Detroit Locker for GM 10.5 14-Bolt differentials is a heavy-duty automatic locking differential designed for serious off-road, overland, and high-performance driving applications. Built for operators and enthusiasts who demand maximum traction and reliability under extreme conditions, this unit delivers full locking performance without electronic controls or driver input—ideal for vehicles operating in remote terrain, recovery operations, or competitive off-road environments where a traditional open differential falls short.

Engineered with 30-spline input and optimized for 4.10 gear ratio and lower configurations, the Detroit Locker uses a gear-driven, fully mechanical locking mechanism that engages automatically whenever wheel slip is detected. Steel construction throughout ensures durability in high-torque scenarios common to lifted trucks and rock crawlers. Unlike limited-slip or electronic alternatives, this locker provides 100% power transfer to both wheels under load, giving you predictable, repeatable traction control. The compact design measures 8.3 x 8.2 x 8.6 inches and weighs just 8.8 pounds, making it a direct bolt-in replacement for compatible GM 10.5-inch 14-bolt housings without modification to existing drivetrain geometry.

This differential carrier is ideal for owners of Chevrolet and GMC trucks equipped with GM 10.5-inch 14-bolt rear axles—particularly those running lifted suspensions, larger tires, or heavy payloads that stress factory open differentials. Installation requires axle removal and carrier swap; professional installation is recommended for proper setup and breakin procedures. The 225S10 model is engineered to function seamlessly within OEM housing specifications, maintaining driveline angles and suspension geometry. Operators should verify compatibility with existing gear ratio before purchase, as the locker performs optimally in 4.10 and lower ratios for street-capable vehicles.