A humming sound coming from the general area of the front end may be noticeable on 1998 Beetles during slow-speed turning with the steering wheel almost to the full turning position.
The noise may be generated from the differential spider gear contacting the one-piece thrust washer under load. In addition, the noise goes away when the steering wheel is returned to the center position.
SERVICE PROCEDURE
If vehicle exhibits this condition:
1. Drain the transmission fluid.
2. Refill the transmission with oil p/n G 052 171 (see VESIS for fill quantities).
Caution: Part numbers are only for reference. Always check with your parts source for the latest parts information.
3. Road test vehicle to confirm that noise has been eliminated.
Technical service bulletin courtesy of ALLDATA.