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

When you're looking to get the most out of your rear end, this Eaton Posi limited-slip differential is a solid choice. It's designed to fit 8.2-inch rear axles with 17-spline axle shafts and is compatible with ring gear pinion ratios of 3.90 and numerically lower. This differential is a popular upgrade for street rods, light-duty pickups, and even some tarmac-running race cars, helping to control traction and prevent wheel slip.

What you get in this package is a well-built limited-slip differential featuring pyrolytic carbon clutch discs. This clutch technology offers smooth, automatic engagement, meaning it works seamlessly without you having to do anything. The gears inside are precision-forged for added strength, making them more durable for the demands of the road or track. Plus, the entire unit is designed to be rebuildable, so you can service it down the road if needed. You can also tune its operation using various spring packs to adjust the pre-loads, giving you a bit more control over how it behaves.

This differential is a significant upgrade for vehicles like the 1955-1958 Chevrolet Bel Air or the 1961-1964 Oldsmobile Dynamic 88, offering improved performance and handling. While installation requires specific knowledge of drivetrain components, the benefits of controlled traction and reduced wheel spin are well worth the effort for many enthusiasts.