9in. Small Pinion Brng. Assembly

The Mark Williams 9in. Small Pinion Bearing Assembly (MPN 57670) is essential for high-performance 9-inch differential setups, designed for street, strip, and off-road applications where reliability under load is critical. This assembly supports the pinion gear, which transfers engine torque to both rear wheels, and is built to withstand extreme radial and thrust forces during various driving conditions.

This small pinion bearing assembly is engineered to replace worn or damaged bearings in existing 9-inch housings, ensuring minimal slop and maximum efficiency. It includes standard precision roller bearings that evenly distribute loads across the pinion shaft, reducing friction and heat generation while maintaining critical bearing preload. Proper installation requires knowledge of pinion depth and bearing shim selection, making it best suited for experienced builders or professional shops.

Builders working on 9-inch differentials in various platforms, including Ford and Mopar, will find this assembly beneficial for enhancing performance and extending differential service life. The Mark Williams brand is well-regarded in the performance automotive community for its high-quality components, making this assembly a reliable choice for serious automotive enthusiasts.