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Ring Gears

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American Axle Manufacturing's 11.5 rear axle in the '03-present Dodge Cummins trucks (and '01-present GM 3/4- and 1-tons) is a massive axle designed for high-torque towing abuse. AAM's 11 1/2-inch ring gear (left) dwarfs the classic Corporate 14-bolt's 10 1/2-incher (middle) and the Ford Sterling 10 1/2-incher (right).