Transfer case clutch (ATC300)

Common symptoms include a jerking or shuddering sensation during hard acceleration, clicking noises from under the vehicle, or a ‘4×4 inactive’ warning light on the dashboard. These issues often stem from worn lamella stacks or damaged needle bearings within the clutch assembly.

Yes, if your BMW (like an E90 or E60 xi model) shudders specifically during low-speed turns or acceleration, it is usually caused by uneven friction in the transfer case clutches. Replacing the ATC300 clutch assembly restores the smooth distribution of torque to the front wheels.

The ATC300 unit is typically found in BMW 3 Series (E90, E91, E92 xDrive models) and 5 Series (E60, E61 xi/xDrive models) produced between 2005 and 2010. Always verify your transfer case model via the tag on the housing before ordering.

This kit includes the essential internal components for a clutch rebuild: the high-friction lamella stacks, the shaft coupling levers, and the precision needle roller bearings required for smooth operation.

Yes, after installing new internal clutch components in an ATC300, you must perform a ‘transfer case adaptation reset’ using a diagnostic tool. This tells the actuator motor that the tolerances have changed, ensuring longevity and proper 4×4 engagement.