Ratio: 3.73Ring Gear Diameter: 8.5"Pinion Splines: 3010 ring gear boltsFits:GM 8.5" and 8.6"FEATURES:Quiet OperationConsistent SetupHeat Treated 8620 SteelUpgrading your differential gear ratio is a requirement when increasing tire size. Choosing the right ratio will reduce engine speed, reduce breakage, and help your rig overcome obstacles more easily.
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