3 Pack - Drive Gear for Sears Crafsman Liftmaster Chamberlain Garage Door Openers 1984-Current For Chamberlain openers manufactured 1984-curent Find the manufacture date under the light cover MUST APPLY LOW TEMP LITHIUM GREASE TO each TOOTH OF NEW GEAR Gear will shred within days if low temp lithium grease is not applies to each Includes 3 Drive Gears.