412 = AAM

AAM ring and pinion gear sets are uniquely designed to match the requirements of the OEM Ring & Pinion designated for your specific vehicle. All performance factors for the size and weight of the specific vehicle must be taken into account. Their innovative “Two-Cut” manufacturing process ensures the lowest tolerances possible for the quiet operation required by OEM Ring & Pinion customers. This “Two-Cut” design also allows for easier setup in the aftermarket replacement business. The combination of materials, heat treating and cut geometry allows for a gear set that has ten-times the life of a non-OEM Ring & Pinion gear set.