A 1985-era build means a specific set of parts: torsion springs sized for the lighter steel doors of that period, extension spring setups on some of the older garages that predate torsion becoming standard here, and openers with chain drives and the trial-and-error limit switches that came before modern safety sensors. The original hardware wasn't built for forty years of cycling, and galvanized cable and springs from that stretch of construction are past the point where we'd recommend anything but replacement if they're showing wear. Cold winters in this part of Washington stiffen old grease on tracks and rollers, which is why a door that worked fine in August can start binding or grinding once the temperature drops - not a sign of a new problem, usually just an old one finally showing itself.