Yes, the joys of DIY. You fix one thing, and then find three more things that need fixing. Just a guess, but maybe your motor is wearing out. Either some bearings, or internal lubrication. YouTube might know better (probably, if you find the right channel).
I had to repair our washer a few months ago. The control panel was going crazy (it would change modes randomly, “start” didn’t always start, etc). I did call a guy in, and he diagnosed the problem. So I had to pay for that bit. He would have had to order the part, and then come back in a week or two. But he was really nice…he gave me the part number (control board), and told me how to open the machine and replace it.
So, I ordered the part myself (took a bit to find it, but I found it). Opened the lid, disconnected the ribbon cables, and removed some screws. The control board was kind of interesting in that a lot of it was plastic toggles that the buttons depressed to engage various things. The “start” toggle was broken, and fell out when I removed the panel. Not sure what was wrong with the dial, but it was simple enough to take the old one out, put the new one in. Works great.
It cost me the diagnostic call, plus the part from the online store, and about an hour of my time (I’m careful and methodical…probably could have done it in 15 minutes, but I am not experienced and wanted to make sure I didn’t do something dumb).
And I did find that one the screws that holds on the outer panel wasn’t doing anything. It was in a “well” that had broken. As soon as I removed the panel, it fell off. I had to gorilla-glue the well to the front panel, let it set, and then remount the panel. The four hours for it to set, I didn’t include in my above estimate of time to repair. If it hadn’t worked, I would have had to drill a hole inside the detergent dispenser and use a sheet metal screw to secure. Otherwise, the panel would have rattled and vibrated. So far, the gorilla-glue is holding.