Revolution gear packages include GM 14-Bolt 10.5 rear axle gear sets and Dana 60 front axle gear sets along with the correct master bearing install kit 8620 Steel Differential Gears Differential Ring And Pinion-Base Revolution Gear & Axle GM10.5-538T GM Ring And Pinion Set RING & PINION GEAR SET - 8.5 GM 10 BOLT 4.10 All Revolution Ring and Pinion sets are backed by an industry leading 2 Year Warranty against defects. GM10-323 OEM AAM Ring & Pinion 10 Bolt Gear Set 8.5/8.6 Chevy Car and With products that have been Street, Off Road and race proven for more than a decade, you can count on Revolution Gear & Axle products to be the best aftermarket parts available., GM 10., 5 14 Bolt THICK 4., 88 Ring and Pinion