Yukon Gear Dura Grip Positraction For GM 12 Bolt Car w/ 33 Spline Axles / 3.08 To 3.90 Ratio

If you're looking to get the most out of your classic GM 12-bolt rear end, especially when it comes to putting power down, a limited-slip differential is a key upgrade. This Yukon Gear Dura Grip positraction unit is built to handle that job, offering smooth engagement for everyday driving while still providing aggressive traction when you need it. It's designed to work with vehicles using a 3.08 to 3.90 gear ratio and 33-spline axles, fitting a wide range of popular GM cars from the 60s and early 70s, like the Chevrolet Chevelle, Impala, and Pontiac GTO.

Yukon builds these Dura Grip units with serious durability in mind. You'll find forged 4320 chromoly spider gears inside, which are known for their strength, and the case itself is made from a high-strength nodular iron. The composite clutches are designed for long life and consistent performance, helping to distribute power effectively to both rear wheels. Plus, the whole unit is completely rebuildable, meaning you can service it down the road if needed. It's assembled in the USA, reflecting a commitment to solid construction.

When you're installing a differential, it's important to have all the right pieces. This unit includes the positraction differential itself, featuring composite clutches. You'll want to ensure you have new bearings, seals, and potentially a ring gear installation kit on hand, as these are typically replaced during a differential service. Proper setup is crucial for performance and longevity, so refer to the manufacturer's installation guide for detailed instructions.