Eaton Posi Differential 28 Spline 1.20in Axle Shaft Diameter 2.73 & Up Ratio Front/Rear 8.5in

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.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
1973-1975	Buick	Apollo	Base
1975	Buick	Apollo	SR
1971-1973	Buick	Centurion	Base
1973-1977,1980-1981	Buick	Century	Base
1975-1979,1982-1989	Buick	Century	Custom
1980-1981,1984	Buick	Century	Estate
1985-1989	Buick	Century	Estate Wagon
1976	Buick	Century	Indianapolis 500 Pace Car
1978-1989	Buick	Century	Limited
1973-1975	Buick	Century	Luxus
1984	Buick	Century	Olympia Limited
1975-1979	Buick	Century	Special
1978-1981	Buick	Century	Sport
1983-1986	Buick	Century	T-Type
1971-1974,1976-1979	Buick	Electra	225
1971-1974	Buick	Electra	225 Custom
1974	Buick	Electra	225 Limited
1973	Buick	Electra	Base
1975	Buick	Electra	Custom
1980-1989	Buick	Electra	Estate Wagon
1975-1989	Buick	Electra	Limited
1978-1989	Buick	Electra	Park Avenue
1989	Buick	Electra	Park Avenue Ultra
1985-1989	Buick	Electra	T-Type
1971-1983	Buick	Estate Wagon	Base
1971-1972	Buick	GS	Base
1971-1972	Buick	GS 455	Base
1971-1981,1987-1989	Buick	LeSabre	Base
1985	Buick	LeSabre	Collector's Edition
1971-1973,1975-1978,1982-1989	Buick	LeSabre	Custom
1977	Buick	LeSabre	Custom Sport
1985-1989	Buick	LeSabre	Estate Wagon
1979-1989	Buick	LeSabre	Limited
1982	Buick	LeSabre	Limited Edition F/E
1974	Buick	LeSabre	Luxus
1978-1981	Buick	LeSabre	Sport
1987	Buick	LeSabre	T-Type
1976-1979	Buick	Opel	Base
1977-1979	Buick	Opel	Deluxe
1978-1979	Buick	Opel	Sport
1988-1989	Buick	Reatta	Base
1973-1987	Buick	Regal	Base
1988-1989	Buick	Regal	Custom
1982-1983	Buick	Regal	Estate Wagon
1987	Buick	Regal	GNX
1989	Buick	Regal	Gran Sport
1984-1987	Buick	Regal	Grand National
1978-1989	Buick	Regal	Limited
1982	Buick	Regal	Limited Turbo
1978-1982	Buick	Regal	Sport
1976-1977	Buick	Regal	SR
1983-1986	Buick	Regal	T-Type
1971-1985	Buick	Riviera	Base
1971	Buick	Riviera	Gran Sport
1975	Buick	Riviera	GS
1982	Buick	Riviera	Limited Edition
1983-1989	Buick	Riviera	Luxury
1978	Buick	Riviera	LXXV Anniversary Edition
1979-1980	Buick	Riviera	S
1976	Buick	Riviera	Sport
1976	Buick	Riviera	SR
1981-1989	Buick	Riviera	T-Type
1983	Buick	Riviera	XX Anniversary Edition
1975-1980	Buick	Skyhawk	Base
1982-1989	Buick	Skyhawk	Custom
1980	Buick	Skyhawk	Designers' Accent Edition
1982-1987	Buick	Skyhawk	Limited
1979-1980	Buick	Skyhawk	Road Hawk
1975-1980	Buick	Skyhawk	S
1988-1989	Buick	Skyhawk	SE
1986-1987	Buick	Skyhawk	Sport
1983-1987	Buick	Skyhawk	T-Type
1970,1972	Buick	Skylark	350
1970-1972,1975-1982	Buick	Skylark	Base
1970-1972,1978-1979,1983-1989	Buick	Skylark	Custom
1980-1989	Buick	Skylark	Limited
1976-1979	Buick	Skylark	S
1978,1980-1983	Buick	Skylark	Sport
1975-1977	Buick	Skylark	SR
1983-1984	Buick	Skylark	T-Type
1986-1987	Buick	Somerset	Custom
1986-1987	Buick	Somerset	Limited
1986	Buick	Somerset	T-Type
1985	Buick	Somerset Regal	Base
1985	Buick	Somerset Regal	Limited
1971-1972	Buick	Sportwagon	Base
1976-1979	Cadillac	Seville	Base
1978-1979	Cadillac	Seville	Elegante
1977-1978	Cadillac	Seville	Opera
1970-1975	Chevrolet	Bel Air	Base
1987-1989	Chevrolet	Beretta	Base
1989	Chevrolet	Beretta	GT
1964-1972	Chevrolet	Biscayne	Base
1970-1972	Chevrolet	Brookwood	Base
1978-1980	Chevrolet	C10	Big Ten
1977-1981	Chevrolet	C10	Cheyenne
1981-1986	Chevrolet	C10	Custom
1977-1980	Chevrolet	C10	Custom Deluxe
1981	Chevrolet	C10	Deluxe
1977-1986	Chevrolet	C10	Scottsdale
1977-1986	Chevrolet	C10	Silverado
1981-1986	Chevrolet	C10 Suburban	Custom
1977-1980	Chevrolet	C10 Suburban	Custom Deluxe
1981	Chevrolet	C10 Suburban	Deluxe
1977-1980,1982,1984-1986	Chevrolet	C10 Suburban	Scottsdale
1977-1980,1982-1986	Chevrolet	C10 Suburban	Silverado
1970-1980,1988	Chevrolet	Camaro	Base
1979-1986	Chevrolet	Camaro	Berlinetta
1985-1989	Chevrolet	Camaro	Iroc-Z
1973-1978,1987	Chevrolet	Camaro	LT
1976-1978	Chevrolet	Camaro	LT Rally Sport
1976-1980	Chevrolet	Camaro	Rally Sport
1970-1973,1975,1989	Chevrolet	Camaro	RS
1981-1987	Chevrolet	Camaro	Sport
1970-1972	Chevrolet	Camaro	SS
1970-1974,1977-1987	Chevrolet	Camaro	Z28
1982	Chevrolet	Camaro	Z28 Indianapolis 500 Pace Car
1971-1972,1986-1989	Chevrolet	Caprice	Base
1973-1989	Chevrolet	Caprice	Classic
1986-1989	Chevrolet	Caprice	Classic Brougham
1976-1978,1981-1982	Chevrolet	Caprice	Classic Estate
1976-1981	Chevrolet	Caprice	Classic Landau
1987-1989	Chevrolet	Caprice	Classic LS Brougham
1975-1976,1979-1980	Chevrolet	Caprice	Classic Sport
1973-1974	Chevrolet	Caprice	Estate
1975	Chevrolet	Caprice	Estate Wagon
1982-1989	Chevrolet	Cavalier	Base
1982	Chevrolet	Cavalier	Cadet
1982-1986	Chevrolet	Cavalier	CL
1983-1987	Chevrolet	Cavalier	CS
1984	Chevrolet	Cavalier	Olympic
1986-1989	Chevrolet	Cavalier	RS
1984-1985	Chevrolet	Cavalier	Type-10
1988-1989	Chevrolet	Cavalier	VL
1986-1989	Chevrolet	Cavalier	Z24
1982-1989	Chevrolet	Celebrity	Base
1982-1983,1989	Chevrolet	Celebrity	CL
1985	Chevrolet	Celebrity	Classic
1982	Chevrolet	Celebrity	CS
1985-1987	Chevrolet	Celebrity	Estate
1984-1989	Chevrolet	Celebrity	Eurosport
1971-1972	Chevrolet	Chevelle	Base
1971-1972	Chevrolet	Chevelle	Concours
1971-1972	Chevrolet	Chevelle	Concours Estate
1973	Chevrolet	Chevelle	Deluxe
1971-1972	Chevrolet	Chevelle	Greenbrier
1971-1972	Chevrolet	Chevelle	Malibu
1971-1972	Chevrolet	Chevelle	Nomad
1971-1972	Chevrolet	Chevelle	SS
1976-1985	Chevrolet	Chevette	Base
1984-1987	Chevrolet	Chevette	CS
1982	Chevrolet	Chevette	Diesel
1977	Chevrolet	Chevette	Rally Sport
1976	Chevrolet	Chevette	Rallye
1983	Chevrolet	Chevette	S
1977	Chevrolet	Chevette	Sandpiper
1976-1983	Chevrolet	Chevette	Scooter
1976	Chevrolet	Chevette	Sport
1976	Chevrolet	Chevette	Woody
1980-1983	Chevrolet	Citation	Base
1980	Chevrolet	Citation	Club
1980	Chevrolet	Citation	Custom
1980-1983	Chevrolet	Citation	X-11
1984-1985	Chevrolet	Citation II	Base
1984-1985	Chevrolet	Citation II	X-11
1987-1989	Chevrolet	Corsica	Base
1987-1988	Chevrolet	Corsica	LT
1989	Chevrolet	Corsica	LTZ
1988	Chevrolet	Corvette	35th Anniversary Edition
1971-1974,1977-1982,1984-1989	Chevrolet	Corvette	Base
1982	Chevrolet	Corvette	Collector's Edition
1978,1986	Chevrolet	Corvette	Indianapolis 500 Pace Car
1978	Chevrolet	Corvette	Silver Anniversary Edition
1975-1976	Chevrolet	Corvette	Stingray
1973-1977	Chevrolet	El Camino	Base
1975-1977	Chevrolet	El Camino	Classic
1977	Chevrolet	El Camino	Conquista
1973-1974	Chevrolet	El Camino	Custom
1973-1977	Chevrolet	El Camino	SS
1971-1985	Chevrolet	Impala	Base
1975-1977	Chevrolet	Impala	Custom
1976	Chevrolet	Impala	Custom Landau
1981-1982	Chevrolet	Impala	Estate
1977-1979	Chevrolet	Impala	Landau
1976	Chevrolet	Impala	S
1975-1976,1979-1980	Chevrolet	Impala	Sport
1977-1981	Chevrolet	K10	Cheyenne
1981-1986	Chevrolet	K10	Custom
1977-1980	Chevrolet	K10	Custom Deluxe
1981	Chevrolet	K10	Deluxe
1977-1986	Chevrolet	K10	Scottsdale
1977-1986	Chevrolet	K10	Silverado
1981-1986	Chevrolet	K10 Suburban	Custom
1977-1980	Chevrolet	K10 Suburban	Custom Deluxe
1981	Chevrolet	K10 Suburban	Deluxe
1977-1980,1982,1984-1986	Chevrolet	K10 Suburban	Scottsdale
1977,1979-1980,1982-1983,1985-1986	Chevrolet	K10 Suburban	Silverado
1977-1981	Chevrolet	K20	Cheyenne
1981-1986	Chevrolet	K20	Custom
1977-1980	Chevrolet	K20	Custom Deluxe