Head Bearing 3.125in

The RATECH Head Bearing 3.125in (part number 7009) is a precision differential component designed for serious gear ratio modifications and custom driveline builds. This bearing is essential for mechanics and enthusiasts working on differential assembly, ring-and-pinion swaps, or complete rear-end rebuilds where OEM tolerances must be preserved.

Engineered to the tight tolerances RATECH is known for, this bearing ensures repeatable bore dimensions and concentricity that keep pinion runout within spec during assembly. The bore diameter of 3.125 inches is critical for maintaining proper pinion mesh alignment and carrier preload, preventing bearing walk or excessive preload that could lead to premature failure.

Ideal for differential applications, this bearing is particularly beneficial for those running forced induction, towing heavy loads, or pushing high-performance setups. Its compact dimensions and weight of 1.54 pounds make it easy to handle and install alongside matching cups and shims to establish the correct bearing preload and pinion depth.