It’s normal for a heavy wash load to sometimes produce a thumping sound at the beginning of the spin cycle. If the sound does not stop, the load is likely out of balance. Simply stop the washer and rearrange the items.
Rattling or clanking sounds can be caused by belt buckles or other metal fasteners in the load. You can fasten these items and turn garments inside out to reduce the sound. Rattling or clanking might also be caused by foreign objects (such as coins or safety pins) in the tub or drum. Stop the washer and check for objects in the tub or drum. If none are present and the sound continues, an object may be in the pump and you should call for authorized service.