Runs, works, but has a low humming vibration. Took out a wad of lint from fan. Anything else to look at while it’s open?
Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=GSE746RFS3
Sounds like you may have found the cause.
Give the blower a spin to see if it now rotates without a wobble.
Check the belt, front drum support and the idler wheel.
Check the rear center mount drum bearing for wear, clean out the old grease and re-grease it with a high temp grease
Might as well clean and check your vent system while you are at it.