I have a Kenmore Dryer Model 110.87892601 that makes a really load noise after it has been running awhile. It is a pulsating noise that is ear piercing the longer you let it go. It doesn't always make the noise when it is first turned on but seems to get loader after it heats up. The performance of the dryer has been fine. The noise is in synch with the drum spinning and pulsates like a wonk..wonk...wonk...wonk. It almost sounds like something electrical/mechanical, not a bearing. Does anybody have any ideas? I could possibly record the sound and post it somehow if the this is possible.