Took the whole dryer apart to access the wheels (4) of them, belt and fan wheel, also had to clean all the lint out that somehow builds up inside the dryer. Plus cleaned out dryer duct vent, added to the time involved. If you are planning on fixing the dryer because of a noise which was in my case, I highly recommend buy all the parts for complete maintenance mentioned above. What helped save me time? I watch a dryer fan wheel replacement training video first, highly recommend this! AppliancePartsPros.com was very helpful! Plus the price and fast shipping was also nice!