Hello to all this is my first post on this site!

I have a 10+ year old kenmore dryer model # LEV7646D that's squealing badly. It started a few months ago when I had to fix the safety switch on the door. I noticed it started sqeaking so I put some lubricant on it(not wd 40). It got better for awhile, but now its worse. Now, when you first turn it on there is a loud buzzing noise and the tumbler turns but it squeals seemingly until it warms up much like a loose belt on a car does. Also, after awhile the motor stops and all you hear is buzzing and it will not turn back on until it cools down. From what I've researched I believe it's the motor bearings. But I wanted to get another opinion on this.

So, what is it?