Loud rumbling noise on dryer startup

I searched the internet and found my symptoms really seemed to indicate a problem with the blower wheel, which was very noisy. Feeling confident that was what I needed, I ordered the blower wheel, and also the tumbler belt (the belt was 12 years old). Both parts were genuine Maytag and arrived quickly. Before the order arrived, I went ahead and UNPLUGGED THE DRYER and disassembled the dryer using the partselect.com helpful parts diagrams and the repair notes of others. This allowed me to confirm the blower wheel was in fact loose on the motor shaft. I removed the old blower wheel and belt. Shop vac'd out the entire dryer cabinet. This way I was able to take my time with preparation, and when the new parts arrived, I was ready to just pop them into place. If you disassemble before you order, you can also determine if the tumbler front guide set and /or rear tumbler roller wheels also need to be replaced (mine did not), but this would have been the perfect time to replace those too. I saved a bunch of money and have the satisfaction of having done this job myself. Dryer works great now.