The LiftMaster worm gear and retainer part 41A4837-1. This is the genuine replacement made by LiftMaster. The 41A4837-1 worm gear and retainer includes the worm gear, retainer and grease.
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Compatible with LiftMaster 2110, 2220, 3110, 3130, 3130M, 3220, 3240 and 3240M models