The LiftMaster gear and sprocket assembly part 41A4885-5 is the most common part to wear out in a garage door opener. Compatible with LiftMaster belt drive models made from 2002 - current. This is the genuine replacement made by LiftMaster and includes everything needed for quick installation. The 41A4885-5 gear and sprocket assembly includes the drive gear(41A2817), worm gear, helical gear(41A2818), retainers, washers, pins, bearing plate, grease and instructions.
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Compatible with LiftMaster 2280, 2580, 2585, 3270, 3280, 3280M, 3585 and 3585S models