Discussion: I know what you mean

My last trainer did that and I just couldn't ride it, it drove me nuts. Phatty got a new one though and it's nice and quiet....good luck with your quest to try to fix it.

Is your trainer rim-drive?
I had a similar racket with a tire that was slipping on the roller a bit, and it went away when I changed to a trainer-specific tire, cleaned the roller with alcohol and cranked up the wheel-roller tension.
I wonder if any of this will apply to your trainer?

The trainer I have is rim-drive. I'm going to try cleaning it with alcohol to see if that fixes the problem. The pads are getting really hot, and I'm wondering if they're just worn out and that's why I'm getting problems. I figure I'll try cleaning it, then if that doesn't do it, consider replacing.

Are these friction pads or do they roll on bearings? If they're friction, they've been overcooked from the sounds of it and it's time for new ones.

They roll on bearings. On them is connected via a band into the resitance wheel. I'm pretty sure the problem is that they're not rolling properly against the rim. They're getting pretty hot so I think they're starting to slide (and squeel) against the rim.

Maybe you need to overhaul the bearings in there. Even sealed bearings can be cleaned up if you pry out the seal.

I don't think it's a bearing thing. I'm almost 100% certain its coming from friction between the roller and the rim. The roller is starting to get worn out, so I think that may be the culprit. I'm going to try to figure out if I can order replacements for it.