DESCRIPTION DESCRIPTION: The Dura Grip is engineered for long life and is completely rebuildable. Dura Grips are constructed with a high strength nodular case, forged 4320 chromoly spider gears, and composite clutches. For unmatched positraction performance, the Dura Grip is the ultimate choice. When your vehicle demands performance, durability and strength, choose Yukon Dura Grip. FEATURES FEATURES: Fits Ford 8.8” Super differential 34 spline 3.31-and-up gear ratio. – Will only work on F150s with a 3.31 or higher gear ratio, including 3.55, 3.73, 4.11, 4.56, etc. It will not work on trucks with a 3.15 gear ratio. High strength nodular case Forged 4320 chromoly spider gears for superior durability Advanced composite clutches Fully rebuildable with stock or custom clutch/spring combinations Proudly assembled in the USA Technical Notes FITMENT VEHICLE FITMENT: Ford F-150 (2015-2023)