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The Yukon Dura Grip posi for GM 8.5" housings with 28-spline axles is aimed at 2.73-and-up gear ratios, delivering smooth limited-slip traction and serviceable rebuildability for compatible differentials. Built with forged 4320 chromoly spider gears, composite clutches and precise tooth cutting, it fits GM 8.5" differentials with 28-spline axles and a four-pinion design.
Yukon Gear Dura Grip Positraction For GM 8.5in w/ 28 Spline Axles
