Bully Driveline Posi Traction differential for use in 1961-1987 Chevrolet/GMC 1/2 & 3/4 Ton Trucks with GM 12-bolt rear differential provides smooth limited-slip operation and aggressive traction on a wide variety of terrains. This Posi unit is manufactured using a high-strength nodular case, forged 4320 chromoly spider gears and Raybestos composite clutches for strength, durability and long life. Whether you're pulling a trailer, hauling a load or enjoying a ride on the street you will experience incomparable positraction performance.
Technical Note: Bully Driveline recommends the use of high-grade Non-Synthetic GL-5 gear oil and LSD (Limited-Slip Differential) additive for smooth operation and long life. The use of Synthetic oil is not recommended and may result in noisy or aggressive operation.
![Posi Traction Differential for GM Truck 12-Bolt 8.875" Rear, 30-Spline [2.76-3.42 Ratio]](http://bullydriveline.com/cdn/shop/products/image_809b9a6a-b4c4-42db-91ca-4f6d0d11f97c.png?v=1666841198&width=1445)