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| - This is a brand new in the box main drive gear and worm gear for Liftmaster, Craftsman, Chamberlain, Wayne Dalton, and Sears. package includes worm gear, drive gear, washers , grease, and instructions to change out all parts except shaft and sprocket, Will work on all models from 1984 to new for chain drive openers , We have been in the Garage door business for 18 years and can assist you with all
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