My 88' trx300 rear brake is not working correctly, and squeaking occasionally.

at first it seemed like the brake was dragging abit, and the rear handbrake was not springing back. So i took everything apart and lubed it all up, adjusted the adjusters, and its still either dragging, squeaking, or just not working at all. Any ideas on what i should do? My pads are a bit glazed, will replacing them solve some of this?