I can not seem to find a diagram on that model.
Is this a USA model whirlpool dryer?
Most often if you remove the dryer drum you will be able to see what is rubbing and making the noise. It will be something that come in contact with the edge of the drum.
When it's a metal on metal sounds there will often be metal filings around the problem area too.
Also if it's a model with drum rollers, then one of the rollers my just be dry or need replacing.