1984-1987 C4 Corvette headlight gears often self-destruct. GM's solution is to sell you $400 worth of new Corvette headlights. Now, you can replace failed gears with Heavy Duty Bronze Gears and avoid the high replacement cost and them breaking ever again!
Large and Small Gears Sold separately.
Tech Note: One large gear and one small gear are needed for each headlamp.