Eaton Posi Differential 17 Spline 3.90 & Down Ring Gear Pinion Ratio Rear 8.2in
Why this price?
$775.99 is MSRP, the lowest price Eaton lets us list it at. Additionally, Pro members get $38.80 back on this part.
$775.99 − $38.80 = $737.19
Special Order
This part is still available to order. Once you place your order, we’ll submit it directly to Eaton, and they’ll ship it straight to you.
Delivery times can vary depending on the brand, so we can’t guarantee an exact arrival date. What we can guarantee is that we’ll stay on top of your order, monitor its progress, and keep you updated until it reaches your door.
Special-order items are typically not kept in stock by most retailers. By ordering through us, your order is placed directly with Eaton, assuring you get the part as quickly as possible.
Want to get an estimated delivery timeframe before ordering? Contact us through our contact page, and we’ll be happy to find out for you.
Not sure it fits? Read our tips.
Fitment tips
Fitment can come down to more than year, make and model. Sometimes the sub-model decides, so start with the fitment table below.
- Drive type. If your car is all-wheel drive, make sure the part is for all-wheel drive, not rear-wheel drive.
- Engine size. For engine parts, make sure the engine size on the product matches your engine.
- Transmission. Manual and automatic cars often take different parts.
- Body style. Sedan or hatch, two-door or four-door, cab and bed length on trucks.
Manufacturer data can sometimes have imperfections. Still not sure? We are happy to help.
Send us a message and we will confirm the fit.
Couldn't load pickup availability
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 |
|---|---|---|---|
| 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 | Biscayne | Fleetmaster |
| 1958-1961 | Chevrolet | Brookwood | Base |
| 1964 | Chevrolet | Chevelle | 300 |
| 1964 | Chevrolet | Chevelle | Malibu |
| 1964 | Chevrolet | Chevelle | Malibu Super Sport |
| 1962-1964 | Chevrolet | Chevy II | Base |
| 1962-1964 | Chevrolet | Chevy II | Nova |
| 1964 | Chevrolet | Chevy II | Nova SS |
| 1960-1964 | Chevrolet | Corvair | Base |
| 1960-1961,1964 | Chevrolet | Corvair | Deluxe |
| 1961 | Chevrolet | Corvair | Lakewood |
| 1960-1964 | Chevrolet | Corvair | Monza |
| 1962-1964 | Chevrolet | Corvair | Monza Spyder |
| 1955-1964 | Chevrolet | Corvette | Base |
| 1957-1958 | Chevrolet | Del Ray | Base |
| 1958-1964 | Chevrolet | Impala | Base |
| 1964 | Chevrolet | Impala | SS |
| 1959-1961 | Chevrolet | Kingswood | Base |
| 1958-1961 | Chevrolet | Nomad | Base |
| 1955-1957 | Chevrolet | One-Fifty Series | Base |
| 1959-1961 | Chevrolet | Parkwood | Base |
| 1955-1957 | Chevrolet | Two-Ten Series | Base |
| 1955-1957 | Chevrolet | Two-Ten Series | Del Ray |
| 1958 | Chevrolet | Yeoman | Base |
| 1964 | Oldsmobile | 442 | Base |
| 1955-1957 | Oldsmobile | 88 | Base |
| 1955-1957 | Oldsmobile | 88 | Holiday |
| 1955-1964 | Oldsmobile | 98 | Base |
| 1963-1964 | Oldsmobile | 98 | Custom |
| 1958-1964 | Oldsmobile | 98 | Holiday |
| 1961 | Oldsmobile | Classic 98 | Base |
| 1961-1964 | Oldsmobile | Cutlass | Base |
| 1964 | Oldsmobile | Cutlass | Holiday |
| 1955-1956 | Oldsmobile | Deluxe 88 | Base |
| 1958-1964 | Oldsmobile | Dynamic 88 | Base |
| 1958-1964 | Oldsmobile | Dynamic 88 | Holiday |
| 1961-1964 | Oldsmobile | F85 | Base |
| 1962-1964 | Oldsmobile | F85 | Deluxe |
| 1957-1964 | Oldsmobile | Fiesta | Base |
| 1957 | Oldsmobile | Golden Rocket 88 | Base |
| 1962-1963 | Oldsmobile | Jetfire | Base |
| 1964 | Oldsmobile | Jetstar 88 | Base |
| 1964 | Oldsmobile | Jetstar 88 | Holiday |
| 1964 | Oldsmobile | Jetstar I | Base |
| 1955-1957,1961-1964 | Oldsmobile | Starfire | Base |
| 1957 | Oldsmobile | Starfire | Holiday |
| 1955-1964 | Oldsmobile | Super 88 | Base |
| 1955-1964 | Oldsmobile | Super 88 | Holiday |
| 1964 | Oldsmobile | Vista Cruiser | Base |
| 1964 | Oldsmobile | Vista Cruiser | Custom |
| 1957-1964 | Pontiac | Bonneville | Base |
| 1959-1962 | Pontiac | Bonneville | Custom |
| 1959-1964 | Pontiac | Bonneville | Safari |
| 1964 | Pontiac | Catalina | 2+2 |
| 1955-1964 | Pontiac | Catalina | Base |
| 1959-1964 | Pontiac | Catalina | Safari |
| 1962-1964 | Pontiac | Catalina | Ventura |
| 1955-1958 | Pontiac | Chieftain | Base |
| 1957 | Pontiac | Chieftain | Custom Safari |
| 1957 | Pontiac | Chieftain | Custom Safari Transcontinental |
| 1955,1958 | Pontiac | Chieftain | Safari |
| 1962-1964 | Pontiac | Grand Prix | Base |
| 1964 | Pontiac | GTO | Base |
| 1963-1964 | Pontiac | LeMans | Base |
| 1955-1964 | Pontiac | Star Chief | Base |
| 1955-1957 | Pontiac | Star Chief | Custom |
| 1958 | Pontiac | Star Chief | Custom Safari |
| 1958 | Pontiac | Star Chief | Super Deluxe |
| 1957-1958 | Pontiac | Super Chief | Base |
| 1961-1964 | Pontiac | Tempest | Base |
| 1961,1964 | Pontiac | Tempest | Custom |
| 1961-1962 | Pontiac | Tempest | LeMans |
| 1961-1964 | Pontiac | Tempest | Safari |
| 1960-1961 | Pontiac | Ventura | Base |
Related videos
