BB.Chry. Oil Pump Drive

The MILODON BB.Chry. Oil Pump Drive is a precision-engineered oil pump drive shaft designed for high-performance Mopar B-series and RB-series engines, including the legendary 426 Hemi. This 7.875-inch chromoly steel gear shaft delivers the durability and reliability required in demanding engine builds where oil pressure consistency and component longevity are non-negotiable. Constructed from chromoly steel, this pump drive combines strength with resistance to the thermal cycling and mechanical stress inherent in performance engine applications.

Chromoly steel offers superior tensile strength compared to standard steel, allowing the drive shaft to handle the torque loads generated by high-displacement engines without flexing or deformation. The gear design ensures consistent engagement with the oil pump's drive mechanism, maintaining steady oil flow under full throttle conditions and sustained high-RPM operation. At 0.96 pounds, this component integrates seamlessly into existing engine assemblies without adding unnecessary weight or complexity. The compact 5.95 x 2.05 x 9.8-inch dimensions fit within standard Mopar B and RB engine compartments, making installation straightforward for experienced builders.

This drive shaft is essential for builders and restorers working with Chrysler B-block and big-block RB engines, particularly those pursuing authentic or enhanced performance configurations. Whether rebuilding a classic 440 Magnum, 383 Stroker, or 426 Hemi engine, the oil pump drive is critical to establishing proper lubrication flow before startup. Sourcing OEM-specification or equivalent pump drives ensures compatibility with factory oil pump assemblies and prevents timing misalignment that could compromise engine protection during break-in and operation. The MILODON pump drive is sold individually, allowing builders to replace worn original equipment or stock spares for complete engine assembly kits.