GM 10-Bolt 8.5 8.6 Inch 3.42-4.88 Ratio Face Hobbed Ring Pinion Revolution Gear and Axle Variant:and 8.6 Inch 4.88 Ratio Face Hobbed Ring and Pinion Revolution Gear Highly accurate

Highly accurate

38 Ratio is a thick gear for fitment with 4

ensuring superior rigidity

Front Passenger (Rear Driver)

1988-1999 GMC C1500 Fleetside 78

GM 10-Bolt 8.5 8.6 Inch 3.42-4.88 Ratio Face Hobbed Ring Pinion Revolution Gear and Axle Variant:and 8.6 Inch 4.88 Ratio Face Hobbed Ring and Pinion Revolution Gear Highly accurateRevolution Gear and Axle ring and pinion manufactured to be compatible with GM 8. 5 Inch GM 8. 6 Inch differentials. GM 10 Bolt ring and pinions are manufactured with the same gear cutting processes as the OE brands, utilizing a Face Hobbed or 2 Cut gear cutting style followed by lapping. Face hobbed gears can be easily distinguished by the equal gear height from heel to toe. Face hobbed gears produce lower noise and increase load carrying capacity