Eaton Posi Diff 28 Spline 1.20in Axle Shaft Dia 3.23 & Up Ratio Rear 7.5in/7.625in/8.5in/8.6in/9.5in

The Eaton 19599-010 Posi Differential is a limited-slip differential designed for GM 7.5-inch and 7.6-inch 10-bolt rear axles. It features a 28-spline count and is compatible with gear ratios of 3.23 and numerically higher. This differential is suitable for various on-road applications including street, muscle car, work truck, towing, drag racing, and restoration, as well as light trail/sand sports off-road. A quality, petroleum-mineral based, GL5 rated 80w-90 gear oil should be used, with a four-ounce bottle of friction modifier for optimum performance (if not already present in the gear oil).