American Axle & Manufacturing, IncDifferential Case

Only original equipment quality components are guaranteed to meet the same specifications as the parts they replace. AAM components mean performance to the vehicle manufacturer’s standards. Reliable - AAM products are designed for long-term reliability. Durable - Advanced processes ensure AAM products withstand the high usage demand of all applications. Quality - AAM products are manufactured to the highest-quality standards that customers demand. Performance - AAM products are engineered, manufactured and validated to meet OEM specifications and ensure ultimate performance.

Differential Case; GM 8.5/8.6; 30 Spline; Helical Gear Type. For years 1988 - 1999 only - General Motors 8.5" and 8.6" axles require special bearings. For axles with small bearing bores (race O.D. or 2.89"), usually found on vehicles prior to 1999, bearing 424260-2 and race ATLM102911 are required. For axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999 to present, bearing 722B270 and race 722B271 are required.