Replacement Gear & Sprocket Kit 41C4220A for LiftMaster – Fits Chamberlain, Sears & Craftsman 1/3–1/2 HP Chain Drive

Revitalize your garage door opener with the TCK TECH Gear & Sprocket Kit

Designed to replace LiftMaster 41C4220A and 41A2827 kits, this comprehensive set is compatible with Chamberlain, Sears, Craftsman, and LiftMaster models that run on 1/3 and 1/2 HP chain drive systems manufactured from 1984 to today. Rather than a simple replacement, it is an all‑in‑one refresh that aims to restore smooth operation and dependable cycling—without guessing or sourcing loose parts separately.

What’s included

• Gear and sprocket, worm gear
• Grease
• Motor shaft bearings and sprocket bearings
• Step-by-step installation instructions
• Free technical support

Why this kit may help you

• Comprehensive parts set designed for compatible 1/3–1/2 HP chain drive operators
• Before installation, expect smoother gear engagement and reduced rattling as the chain meshes
• Ease of install with the spur gear already mounted on the new output shaft, saving time
• Fresh bearings and grease can support longer life and quieter operation

Installation and support

Clear, step-by-step instructions guide you through the replacement process. If you need a helping hand, free tech support is available to answer questions and walk you through tricky steps.

Fit and compatibility

Made to suit LiftMaster 41C4220A style kits alongside similar 41A2827 drive components, the set covers Chamberlain, Sears, Craftsman, and LiftMaster chain drive units from 1984 to today. Always confirm compatibility with your exact model and horsepower before starting the project.

Why choose TCK TECH

As a brand focused on practical, reliable parts for DIY garage projects, TCK TECH aims to simplify maintenance with complete, ready-to-install solutions. This kit blends robust materials with an installation-friendly design, helping you bring back smooth door operation without guesswork.