# Eaton Detroit Truetrac Differential 28 Spline 1.20in Axle Shaft Diameter 2.73 & Up Ratio Rear 8.5in The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse. Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle. - Optimized Torque Bias Ratios Deliver Max Acceleration And Handling - No Special Lubrication Or Friction Modifiers Needed - Helical Gear Limited Slip Differential - Durable; Smooth; Quiet Operation - Works In Forward And Reverse - Ideal For Most Vehicles - Automatic Engagement 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 1973 Chevrolet Chevelle Laguna 1973 Chevrolet Chevelle Laguna Estate 1974-1976 Chevrolet Chevelle Laguna Type S-3 1971-1977 Chevrolet Chevelle Malibu 1974-1977 Chevrolet Chevelle Malibu Classic 1974-1976 Chevrolet Chevelle Malibu Classic Estate 1973 Chevrolet Chevelle Malibu Estate 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 ## Details - **Price:** 984.29 CAD - **Vendor:** Eaton - **Type:** Differentials ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 984.29 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - Photo - Unmounted --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/eaton-detroit-truetrac-differential-28-spline-1-20in-axle-shaft-diameter-2-73-up-ratio-rear-8-5in) > Updated: 2026-06-27