kenmore dryer 110.97588210 help!

[keeper35]

:confused: found a felt ring in dryer, since then it is lound and takes much longer to dry,what's wrong and how do i repair it?

[RegUS_PatOff]

could it be #27 (front or rear) drum seals

11097588210 BULKHEAD diagram (http://content.searspartsdirect.com/lis_png/PLDM/10036729-00003.png)