Rattling during the spinning cycle is a common occurrance.
Your rattling is probably caused by an improperly balanced load that can be easily solved. To solve this dilemma, try the following procedure:
* Simply open the lid.
* Wait for the barrel to quit spinning.
* Lift the wet items up. Move them around a bit and redistribute the load.
* Close the lid. The spinner should start automatically.
If the rattling still occurs, repeat the procedure above. If it continues, you may need to call in a professional.