Hub (ATC350, ATC450, PL72 ATC)

Shuddering or jerking often indicates a problem within the transfer case clutch assembly. This hub is critical because it maintains the correct spacing for the clutch discs and pressure plates. If the hub is worn or damaged, the clutch pack cannot engage smoothly, leading to the vibrations you feel.

This hub acts as the structural foundation for the clutch pack. It is responsible for the precise spacing of the clutch discs, the pressure plate, the diaphragm springs, and the clutch springs. It ensures that the clamping force is distributed evenly across the internal components for reliable 4WD engagement.

Yes. This hub is manufactured from high-grade stainless steel, providing exceptional resistance to heat and mechanical wear. Unlike standard steel components that may degrade under high friction, this stainless steel version is designed for longevity and consistent performance in demanding driving conditions.

This product is compatible with BMW vehicles equipped with the ATC350 and ATC450 transfer cases (common in X-series models) and Porsche vehicles using the PL72 ATC system. Always verify your transfer case type before ordering to ensure a perfect fit.

While you are servicing the transfer case, it is highly recommended to inspect the diaphragm and clutch springs. Since this hub spaces those exact components, replacing worn springs alongside the hub will restore the factory-spec pressure and prevent future teardowns.