Big Ford Axle Bearings

The Mark Williams Big Ford Axle Bearings (part number 58504) are precision wheel bearings engineered specifically for large Ford 9-inch and Oldsmobile housing rear ends. These ball bearings deliver the reliability and durability required in high-performance suspension systems, whether you're building a street machine, drag racing, or maintaining a classic restoration project. With a 3.150-inch outer diameter and 1.625-inch inner diameter, these bearings are sized to handle the rotational demands of serious automotive applications where stock components fall short.

Each bearing pair includes integrated lock ring and O-ring components, eliminating the need to source additional hardware for installation. The lock ring secures the bearing assembly in place while the O-ring provides a sealed interface that resists contamination and moisture ingress—critical factors in wheel bearing longevity. The precision ball bearing construction minimizes friction and heat generation during sustained high-speed or high-load driving, ensuring consistent performance through extended driving sessions. At 2.75 lbs per pair, these bearings provide the structural integrity required for vehicle dynamics without unnecessary weight penalty.

These Mark Williams bearings are the choice for hot rod builders, drag racers, and restoration specialists who demand OE-quality components with proven reliability in competition and street duty. Whether you're upgrading worn bearings on a classic Ford-powered vehicle or building a high-performance rear axle assembly, these 58504 bearings deliver the precision fit and load-bearing capacity expected from a brand with deep roots in the automotive performance industry. The included sealing components reduce maintenance intervals and protect against bearing failure from road salt, moisture, and extreme operating conditions.