Yukon Gear Trac Loc For Ford 9in Wtih 31 Spline Axles. Aggressive Design

Yukon Dura Grip is a positraction limited slip differential that provides smooth yet aggressive traction, giving you the confidence and performance you need across a wide variety of terrains. 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.
Fits Ford 9'' with 31 spline axles, aggressive design. Dura Grip positractions feature a 4-spring design and composite clutches for long life and forged internals for high strength.
This unit has 1.783in. bearing journals. This unit will not fit in Strange Engineering aluminum dropouts. Yukon recommends the use of high grade Non-Synthetic GL-5 gear oil and Yukon LSD (Limited Slip Differential) additive for long life and smooth operation. Part number OILADD. The use of synthetic oil is not recommended and may result in aggressive or noisy operation. This unit requires the use of ring gear bolt part number YSPBLT-014.
9"31spl HD T/L RACE (will CHATTER & needs T/L bolts)