I figured the worst but hoped for the best. I ordered tumbler bearing kit/s and decided the thermostat needed replacing as well. In the videos that Appliance Parts Pros have on line, I learned that the thermal fuse could be a problem as well. Sure enough, as I replaced the parts I noticed where the fuse had blown (looked as though it had a small leak of some sort) and after taking the dryer apart (except the motor) and cleaning it up and getting it back together, it ran like a charm for a little bit, then the noise once again! I took part of the front off of the machine and after two tries to find out what the problem was, it turned out to be the blower wheel, I had seen earlier when I had things apart that the wheel had a small break in it! Lesson learned. Thanks for having the parts Appliance Parts Pros and the great service!