Eaton Detroit Locker Automatic Locking Differential 30 Spline AAM 11.5in Rear 2001-2019 Chevy Silverado GMC Sierra 2500HD 3500HD

Description The Eaton Detroit Locker 250SL195A is the legendary automatic locking differential that revolutionized performance differentials and remains the industry benchmark for strength and durability. This 30-spline unit fits AAM 11.5-inch rear axles found in GM and Dodge heavy-duty trucks, delivering 100 percent of available torque to both drive wheels during straight-line driving. When turning, the internal components automatically unlock to allow necessary wheel speed differentiation, then re-engage when returning to straight-line travel. The Detroit Locker is engineered to keep both wheels in constant drive mode, even if one wheel is lifted completely off the ground. This makes it the ultimate choice for extreme off-road use, rock crawling, racing, and any application where maximum traction is non-negotiable. Key Features 100% automatic locking with no driver action required Delivers full torque to both wheels in straight-line driving Automatically unlocks during turns for wheel speed differentiation Keeps both wheels in drive mode even if one lifts off ground Works in forward and reverse Maintenance-free design requires no special lubricants Bulletproof construction for extreme applications ABS compatible Fits all gear ratios Components Detroit Locker differential carrier assembly Complete internal gear set Installation hardware Specs Axle: AAM 11.5-inch 14-bolt Spline Count: 30 Spline Diameter: 1.55 inches Ring Gear Size: 11.5 inches Gear Ratios: All ratios Axle Location: Rear Differential Type: Automatic Locking Weight: Approximately 69 lbs Fitment: 2001-2019 GM Silverado/Sierra 2500HD/3500HD, 2003-2019 Dodge Ram 2500/3500 Installation Installation requires removal of the existing carrier and is recommended to be performed by an experienced drivetrain specialist. Installation time is typically 3-4 hours. Use quality petroleum GL-5 rated mineral based gear oil. Synthetic oils may also be used per axle manufacturer recommendations. Installation guides available at eaton.com. Our Take At Strictly SVDs, the Detroit Locker is what we recommend for customers who demand absolute maximum traction regardless of terrain. While the Truetrac is perfect for street-driven trucks, the Detroit Locker is engineered for the extremes, from deep mud and rock crawling to drag racing and pulling competitions. Be aware that lockers do produce a characteristic clicking sound during turns and may cause some tire chirp on dry pavement, but this is normal operation and the trade-off for unmatched traction capability. For heavy-duty trucks that see serious off-road duty or extreme towing conditions, the Detroit Locker is simply the most durable and dependable differential available.