Eaton Posi Differential 30 Spline 1.29in Axle Shaft Diameter 3.08-3.90 Ratio Rear 8.875in

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 Eatonss limited-slip differential for their traction answers. And the fact is, Eatons Posi units are virtually bullet proof.This Part Fits: Year Make Model Submodel 1971-1972 Buick Centurion Base 1968-1972 Buick Electra 225 1968-1972 Buick Electra 225 Custom 1964-1967 Buick Electra Base 1966-1967 Buick Electra Custom 1964,1970-1972 Buick Estate Wagon Base 1965-1967 Buick Gran Sport Base 1970-1972 Buick GS Base 1968-1969 Buick GS 350 Base 1968-1969 Buick GS 400 Base 1970-1972 Buick GS 455 Base 1970 Buick GS 455 GSX 1964-1972