The Eaton Detroit Locker Posi differential, part number 19557-010 or 19557010, is a limited-slip unit built for General Motors 8.5-inch 10-bolt axles with 28-spline shafts and ring gear ratios of 2.73 and up. The axle shaft diameter is 1.2 inches. Rated for street and muscle, drag racing, restoration, work truck and towing, and light off-road trail use. Note: GM 8.5-inch and 8.6-inch Eaton differentials require specific bearings based on bearing bore size. Axles with a race O.D. of 2.89 inches (typically pre-1999) require bearing LM102949 and race LM102911; axles with a race O.D. of 3.06 inches (typically 1999-2013) require bearing LM603049 and race LM603012. Manual locking hubs are recommended for front axle applications. Call us to confirm proper fit for your axle.
Features
Limited-slip differential (LSD) type
Fits GM 8.5 in. 10-bolt axle
28-spline gear tooth count
Compatible with ring gear ratios of 2.73 and up
1.2 in. axle shaft diameter
Suited for street, drag racing, towing, restoration, and light trail use
Tech Specs
- Differential Type: Limited Slip (LSD)
- Ring Gear Size: 8.5 in.
- Ring Gear Ratio: 2.73 and up
- Gear Spline Tooth Count: 28
- Axle Shaft Diameter: 1.2 in.
- Axle Bolt Pattern: 10-bolt (GM)
- Vehicle Usage: Street and Muscle, Drag Racing, Restoration, Work Truck / Towing, Light Trail / Sand Sports
- Bearing Note (small bore, race O.D. 2.89 in. - typically pre-1999): Bearing LM102949, Race LM102911
- Bearing Note (large bore, race O.D. 3.06 in. - typically 1999-2013): Bearing LM603049, Race LM603012
- Front Axle Note: Manual locking hubs recommended
