Bearingless roller binding
Rollers on track this old tend to be nylon or steel without bearings, so they wear down to where the door binds or jumps the track on a cold morning. The climate here runs cold with real seasonal swings, and steel sections from the early 1980s don't flex the same way newer doors do - panels can bow or the bottom seal can crack where it meets a driveway that's shifted slightly over four decades.