Transfer case bearing KIT (ATC300)

A high-pitched whining or grinding noise often indicates that the bearings inside your ATC300 transfer case are worn out. These bearings support the internal shafts; when they fail, they cause vibration and noise. Replacing them with this kit can restore quiet operation.

This kit is specifically designed for the ATC300 transfer case, which is commonly found in BMW 3 Series (E90, E91, E92) and 5 Series (E60, E61) xDrive models produced between 2005 and 2010. Always check your transfer case type before ordering.

Common signs include a shuddering sensation during acceleration, vibrations felt through the floorboard, and unusual metallic noises. If left unaddressed, worn bearings can lead to total transfer case failure or damage to the output shafts.

Installation requires significant mechanical knowledge, as the transfer case must be removed from the vehicle and disassembled. You will likely need specialized tools like a bearing puller and a press. For most owners, we recommend professional installation by a transmission specialist.

By providing stable and precise support for the internal shafts, these bearings ensure that the gears remain perfectly aligned. This reduces friction and ensures the transfer case can balance torque distribution between the front and rear axles effectively.