Eaton Posi Differential 17 Spline 3.90 & Down Ring Gear Pinion Ratio Rear 8.2in

The Eaton Posi limited-slip differential is the perfect way to control traction in street rods, light duty pickups and all types of tarmac running race cars. Featuring pyrolytic carbon clutches, rebuildable design, net-forged gears for added strength and seamless, automatic operation.This Part Fits: Year Make Model Submodel 1955-1958 Buick Century Base 1959-1962 Buick Electra 225 1959-1964 Buick Electra Base 1959-1964 Buick Estate Wagon Base 1959-1963 Buick Invicta Base 1959-1964 Buick LeSabre Base 1958 Buick Limited Base 1963-1964 Buick Riviera Base 1957 Buick Roadmaster 75 1955-1958 Buick Roadmaster Base 1961-1964 Buick Skylark Base 1955-1958,1961-1964 Buick Special Base 1961-1964 Buick Special Deluxe 1964 Buick Sportwagon Base 1955-1958 Buick Super Base 1962-1964 Buick Wildcat Base 1955-1964 Chevrolet Bel Air Base 1955-1956 Chevrolet Bel Air Beauville 1955-1957 Chevrolet Bel Air Nomad 1958-1964 Chevrolet Biscayne Base 1960 Chevrolet Biscayn