Transfer case friction and steel plates KIT (ATC300, ATC400)

Common symptoms of worn friction plates include a noticeable jerking or shuddering sensation during hard acceleration or while making tight turns at low speeds. You might also experience ‘slipping’ where the 4×4 system fails to distribute torque correctly to the front wheels.

Yes, this kit is specifically designed for the ATC400 transfer case (commonly found in the BMW X3 E83) and the ATC300 transfer case (found in the BMW 3 Series E90/E91/E92 and 5 Series E60/E61 xDrive models). Always verify your transfer case model on the housing tag before ordering.

Yes, as a professional rule of thumb, you should soak the friction plates in the recommended DTF-1 (or equivalent) transfer case fluid for at least 30-60 minutes before assembly. This prevents ‘dry start’ wear during the initial engagement after the rebuild.

This is often caused by ‘stick-slip’ in the transfer case clutch pack. When the friction plates lose their grip or the steel plates become warped due to heat, the torque transmission becomes uneven. Replacing the internal plates with this kit usually resolves these drivetrain vibrations.

It is highly recommended to replace both as a set. Steel plates often suffer from heat spots and microscopic warping that isn’t visible to the naked eye. Using new friction plates with old, uneven steel plates will lead to premature failure and poor shift quality.