Eaton Detroit Locker Automatic Locking Differential 30 Spline GM 10.5in 14-Bolt 1972-2011 Chevy Silverado GMC Sierra HD Trucks

Description The Eaton Detroit Locker 225S10 is a NoSpin-style automatic locking differential designed for GM 10.5-inch 14-bolt rear axles. This unique design installs inside your existing differential case by replacing the spider gears, making installation more straightforward than full carrier replacement units. The Detroit Locker maximizes traction by delivering 100 percent of torque to both drive wheels during straight-line driving while automatically unlocking during turns to permit necessary wheel speed differentiation. This maintenance-free design requires no special lubricants or service adjustments and is compatible with four-channel anti-lock brake systems. For GM 3/4-ton and 1-ton trucks from 1972 to present, this locker transforms your 14-bolt axle into a maximum-traction powerhouse. Key Features Fully locked speed-sensitive differential Automatically unlocks when wheel speeds are mismatched Uses original differential case for simplified installation Clutchless maintenance-free design Works in forward and reverse No individual wheel spin-out Compatible with four-channel ABS systems No special lubricants required Fits all gear ratios Components Detroit Locker NoSpin differential unit Internal gear components Installation hardware Specs Axle: GM 10.5-inch 14-bolt Spline Count: 30 Spline Diameter: 1.50 inches Ring Gear Size: 10.5 inches Cover: 14-bolt Gear Ratios: All ratios Axle Location: Rear Differential Type: Automatic Locking Case Requirement: Uses existing GM open differential case (6258336 for 4.10 down, 6258340 for 4.56 up) Fitment: 1972-2011 GM 3/4-ton and 1-ton trucks with full-floating rear axle Installation Installation requires disassembly of the existing differential to remove spider gears and install the NoSpin unit. This design allows retention of your original case. Installation time is typically 2-3 hours for experienced technicians. Use quality GL-5 gear oil. Installation guides available at eaton.com. Our Take At Strictly SVDs, the NoSpin-style Detroit Locker offers a unique advantage for customers who want full locker capability without replacing their entire carrier assembly. By utilizing your existing differential case, this unit often provides a more budget-friendly path to maximum traction. The GM 14-bolt axle is already legendary for its strength, and adding this Detroit Locker transforms it into an unstoppable combination. Whether you are running an older square body or a later model HD truck, this locker delivers the same bulletproof automatic locking performance that has made Detroit Locker the choice of professionals for over 70 years.