# Eaton Posi Differential 30 Spline 1.29in Axle Shaft Diameter 3.08-3.90 Ratio Rear 8.875in 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. - Tunable via various spring packs \[a.k.a. pre-loads\] - Pyrolytic Carbon Clutch Disc Technology - Clutch Type Limited Slip Differential - Smooth; Automatic Engagement - Precision-Forged Gears - Prevents Wheel Slip - Rebuildable 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 Buick LeSabre Base 1965-1972 Buick LeSabre Custom 1964-1972 Buick Riviera Base 1965-1966,1971 Buick Riviera Gran Sport 1970,1972 Buick Skylark 350 1964-1972 Buick Skylark Base 1968-1972 Buick Skylark Custom 1964-1969 Buick Special Base 1964-1967 Buick Special Deluxe 1964-1972 Buick Sportwagon Base 1966,1968-1969 Buick Sportwagon Custom 1964-1969 Buick Wildcat Base 1965-1970 Buick Wildcat Custom 1965 Buick Wildcat Deluxe 1966 Buick Wildcat Gran Sport 1964-1972 Chevrolet Bel Air Base 1964-1972 Chevrolet Biscayne Base 1969-1972 Chevrolet Brookwood Base 1967-1972 Chevrolet Camaro Base 1967-1972 Chevrolet Camaro RS 1967-1972 Chevrolet Camaro SS 1967-1972 Chevrolet Camaro Z28 1966-1972 Chevrolet Caprice Base 1964-1968 Chevrolet Chevelle 300 1965-1969 Chevrolet Chevelle 300 Deluxe 1970-1972 Chevrolet Chevelle Base 1967-1972 Chevrolet Chevelle Concours 1969-1972 Chevrolet Chevelle Concours Estate 1969-1972 Chevrolet Chevelle Greenbrier 1964-1972 Chevrolet Chevelle Malibu 1964-1965 Chevrolet Chevelle Malibu Super Sport 1968-1972 Chevrolet Chevelle Nomad 1968 Chevrolet Chevelle Nomad Custom 1971-1972 Chevrolet Chevelle SS 1967-1970 Chevrolet Chevelle SS 396 1966 Chevrolet Chevelle Super Sport 396 1964-1967 Chevrolet Chevy II Base 1964-1968 Chevrolet Chevy II Nova 1964-1967 Chevrolet Chevy II Nova SS 1968-1969 Chevrolet Corvair 500 1964-1967 Chevrolet Corvair Base 1965-1966 Chevrolet Corvair Corsa 1964 Chevrolet Corvair Deluxe 1964-1969 Chevrolet Corvair Monza 1964 Chevrolet Corvair Monza Spyder 1964-1972 Chevrolet Corvette Base 1965-1972 Chevrolet El Camino Base 1968-1972 Chevrolet El Camino Custom 1968-1972 Chevrolet El Camino SS 1969-1970 Chevrolet Estate Base 1964-1972 Chevrolet Impala Base 1964-1967 Chevrolet Impala SS 1969-1972 Chevrolet Kingswood Base 1969-1972 Chevrolet Kingswood Estate 1970-1972 Chevrolet Monte Carlo Base 1969-1972 Chevrolet Nova Base 1969-1972 Chevrolet Townsman Base 1971-1972 Chevrolet Vega Base 1971-1972 Chevrolet Vega Panel 1964-1971 Oldsmobile 442 Base 1964-1972 Oldsmobile 98 Base 1964 Oldsmobile 98 Custom 1964-1967 Oldsmobile 98 Holiday 1971-1972 Oldsmobile Custom Cruiser Base 1964-1972 Oldsmobile Cutlass Base 1972 Oldsmobile Cutlass Cruiser 1964-1967 Oldsmobile Cutlass Holiday 1968,1971-1972 Oldsmobile Cutlass S 1967 Oldsmobile Cutlass Turnpike Cruiser 1967-1972 Oldsmobile Cutlass Supreme Base 1967-1968 Oldsmobile Delmont 88 Base 1967 Oldsmobile Delmont 88 Holiday 1965-1972 Oldsmobile Delta 88 Base 1967-1971 Oldsmobile Delta 88 Custom 1965-1967 Oldsmobile Delta 88 Holiday 1969-1972 Oldsmobile Delta 88 Royale 1964-1966 Oldsmobile Dynamic 88 Base 1964-1966 Oldsmobile Dynamic 88 Holiday 1964-1972 Oldsmobile F85 Base 1964-1966 Oldsmobile F85 Deluxe 1966 Oldsmobile F85 Holiday 1964 Oldsmobile Fiesta Base 1964-1966 Oldsmobile Jetstar 88 Base 1964-1966 Oldsmobile Jetstar 88 Holiday 1964-1965 Oldsmobile Jetstar I Base 1964-1966 Oldsmobile Starfire Base 1964 Oldsmobile Super 88 Base 1964 Oldsmobile Super 88 Holiday 1966-1972 Oldsmobile Toronado Base 1971-1972 Oldsmobile Toronado Brougham 1968-1970 Oldsmobile Toronado Custom 1966-1967 Oldsmobile Toronado Deluxe 1964-1972 Oldsmobile Vista Cruiser Base 1964-1967 Oldsmobile Vista Cruiser Custom 1964-1972 Pontiac Bonneville Base 1964-1970 Pontiac Bonneville Safari 1964-1967 Pontiac Catalina 2+2 1964-1972 Pontiac Catalina Base 1971-1972 Pontiac Catalina Brougham 1964-1972 Pontiac Catalina Safari 1964-1970 Pontiac Catalina Ventura 1967-1970 Pontiac Executive Base 1967-1970 Pontiac Executive Safari 1968-1969 Pontiac Firebird 350 1969 Pontiac Firebird 350 HO 1967-1969 Pontiac Firebird 400 1967-1972 Pontiac Firebird Base 1970-1972 Pontiac Firebird Esprit 1970-1972 Pontiac Firebird Formula 1967 Pontiac Firebird HO 1967-1969 Pontiac Firebird Sprint 1969-1972 Pontiac Firebird Trans Am 1964-1972 Pontiac Grand Prix Base 1971-1972 Pontiac Grand Safari Base 1971-1972 Pontiac Grandville Base 1964-1972 Pontiac GTO Base 1970-1971 Pontiac GTO The Judge 1964-1972 Pontiac LeMans Base 1972 Pontiac LeMans Luxury 1969-1970 Pontiac LeMans Safari 1970-1972 Pontiac LeMans Sport 1971 Pontiac LeMans T37 1964-1966 Pontiac Star Chief Base 1966 Pontiac Star Chief Executive 1964-1970 Pontiac Tempest Base 1964-1969 Pontiac Tempest Custom 1970 Pontiac Tempest GT 1964-1969 Pontiac Tempest Safari 1971-1972 Pontiac Ventura Base ## Details - **Price:** 1059.34 CAD - **Vendor:** Eaton - **Type:** Differentials ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1059.34 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - Photo - Unmounted --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/eaton-posi-differential-30-spline-1-29in-axle-shaft-diameter-3-08-3-90-ratio-rear-8-875in) > Updated: 2026-06-27