LiftMaster 41C4220A / 41C4220 Chain Drive Gear & Sprocket Kit (1993-Present)

The LiftMaster 41C4220A (also known as 41C4220) is the complete official replacement gear and sprocket kit for all LiftMaster, Chamberlain, and Sears-Craftsman chain drive garage door openers manufactured after 1993. Perfect for fixing common issues like grinding noises, stripped gears, slow operation, or complete failure.

This kit restores smooth, quiet performance and is the exact OEM-equivalent part used by professionals and DIYers alike.

What's Included in the 41C4220A Gear Kit

• Helical gear and top hat assembly
• Worm gear
• Wear bushings
• Metal drive sprocket
• Grease packet and all necessary hardware

Compatible Models

Fits all post-1993 LiftMaster, Chamberlain, and Sears-Craftsman chain drive garage door openers (1/3 HP and 1/2 HP models). Also compatible with many Craftsman, Master Mechanic, and Garage Master chain-drive units from the same era.

Note: This kit is designed exclusively for chain-drive models manufactured after 1993. It will not fit belt-drive, screw-drive, or pre-1993 openers.

Easy DIY Installation

Replacing the gears is a straightforward job that most homeowners can complete in under an hour with basic tools. No special skills required!

Watch the Step-by-Step Instructional Video:
▶ How to Install the LiftMaster 41C4220 Gear Kit (Video)

Download Official 41C4220 Installation Instructions (PDF)

Why Replace Your Gears with the 41C4220A Kit?

• Stops loud grinding or screeching noises
• Restores full speed and power to your opener
• Prevents further damage to the motor and chain
• Far cheaper than buying a new garage door opener
• Exact OEM-quality parts for long-lasting reliability
• Includes everything you need – no extra trips to the store

Product Summary

LiftMaster 41C4220A / 41C4220 Gear & Sprocket Kit – the complete replacement solution for chain drive garage door openers (1993 to present). Compatible with LiftMaster, Chamberlain, Sears-Craftsman, and more. Comes with full instructions and an easy-to-follow installation video.