Hub (ATC45L, ATC35L, Hyundai ATC)

The hub is a critical component made of stainless steel that maintains precise spacing for the clutch discs, pressure plate, diaphragm springs, and clutch springs. It ensures the internal clutch mechanism engages and disengages smoothly, preventing slippage or jerking during power distribution.

Common symptoms of a faulty hub or clutch assembly include a shuddering sensation during acceleration, clicking noises from under the vehicle, or a ‘4×4 inactive’ warning light on the dashboard. If the spacing is off due to wear, the clutch discs won’t engage correctly.

Yes, this hub is designed to fit the ATC35L and ATC45L transfer case systems used in various BMW models, as well as specific Hyundai ATC units. Always verify your transfer case model code before purchasing to ensure a perfect fit.

Stainless steel is used to provide superior durability and resistance to heat and corrosion. Since this part is responsible for holding the tension of diaphragm and clutch springs, the material prevents warping under the high-pressure environment of the transfer case.

While it is physically possible, mechanics usually recommend inspecting the clutch discs and springs at the same time. If the hub is worn or damaged, there is a high likelihood that the plates it spaces have also experienced uneven wear. Replacing them together ensures a longer-lasting repair.