Yukon Gear & Axle YDGF9-31-SM 9" Ford Dura Grip Limited Slip Differential 31 Spline Trac-Loc

The Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, designed specifically for street and everyday driving applications. This differential carrier fits 9" Ford axles with 31 spline axles and all gear ratios, making it a versatile upgrade for Ford 9-inch rear ends.

Key Features:

• 2 preload spring design with 4 pinion configuration for smooth engagement ideal for street use
• High strength nodular iron case with forged 4320 chromoly spider gears
• Composite clutches for high performance and extended service life
• Billet side hat and forged internals provide higher strength than stock Trac-Locs
• 1.783" bearing journals
• Completely rebuildable design, proudly assembled in the USA

The smooth 2-spring design provides moderate lockup characteristics that work well for daily driving, offering reliable traction without being overly aggressive. The 4 pinion design ensures optimal traction, enhanced handling, and maximum torque distribution, delivering improved vehicle control in various driving conditions.

Installation Notes: Yukon recommends using high grade non-synthetic GL-5 gear oil and Yukon LSD additive (part number OILADD) for optimal performance and longevity. Synthetic oil is not recommended and may result in aggressive or noisy operation. This unit will not fit in Strange Engineering aluminum dropouts. Requires ring gear bolt part number YSPBLT-014.

Backed by Yukon's one-year warranty against manufacturing defects, this differential carrier delivers the durability and performance needed for street-driven vehicles with Ford 9-inch rear ends.