Transfer case bearing Kit (ATC500, ATC700)

Common symptoms of worn ATC500 or ATC700 bearings include a low-pitched humming or grinding noise from the center of the vehicle, vibrations during acceleration, and occasional jerking or shuddering during low-speed turns. If you hear metallic noises that change with vehicle speed, your bearings likely need replacement.

This kit is specifically designed for BMWs equipped with the ATC500 transfer case (typically found in the X5 E53 LCI) and the ATC700 transfer case (found in the X5 E70 and X6 E71). Always verify the model number on the transfer case tag before purchasing.

These bearings provide critical support for the internal shafts. They ensure that the shafts remain perfectly aligned while rotating, which allows for the balanced transmission of torque between the front and rear axles without excessive friction or heat build-up.

Yes, replacing transfer case bearings is a complex task. It requires removing the transfer case from the vehicle, disassembling the unit, and using specialized tools like hydraulic presses and bearing pullers. We highly recommend having this kit installed by a professional BMW technician or transmission specialist.

Because the labor cost to open and reseal a transfer case is high, it is much more cost-effective to replace the entire bearing set at once. If one bearing has failed, the others have likely been exposed to the same contaminated oil or stress and may fail soon after.