The Eaton Posi limited-slip differential prevents wheel slip before it can get started. To do that, carbon disc clutch packs, preloaded by a central spring assembly, are located behind each differential side gear. When torque input increases the clamping load on the clutch packs increases. That causes the chatter-free clutch packs to grab and transfer power to the other wheel. Muscle cars, hot rods and mild off-road vehicles should look to Eaton's limited-slip differential for their traction answers. And the fact is, Eaton's Posi units are virtually bullet proof. ​

Application: 1965-1981 GM 8.875" Chevy 12 bolt Truck Rearend (will not fit Car)

Compatible gear ratios: 2.76-3.42  (3-series) 

Axle Spline: 30