The LiftMaster 41C4470 Gear and Sprocket Assembly is an OEM drive component for select LiftMaster and Chamberlain chain-drive garage door openers. It replaces a worn or stripped drive hub and top sprocket that transmit motor power to the chain, restoring smooth travel and consistent lifting performance. Common symptoms indicating this part is needed include grinding noises, a stationary chain while the motor runs, or intermittent door movement. As a factory-original replacement part, it is engineered to fit the specified operator families it was designed for and to bring the opener back to reliable operation in residential applications.
This assembly is intended only for compatible chain-drive models and is not for belt-drive or screw-drive units. It may also fit select Craftsman-branded openers manufactured by Chamberlain when the parts diagram calls out 41C4470; always verify compatibility by checking your model’s service manual or the parts list on the opener’s label. Installation typically involves disconnecting power, disengaging the trolley, removing the opener cover, swapping the gear and sprocket assembly, re-tensioning the chain, and reprogramming or adjusting travel limits and force settings per the manufacturer’s instructions. Follow all safety procedures: secure the door in the down position, relieve chain tension before disassembly, and test the safety reversal system after the repair. This LiftMaster 41C4470 replacement helps extend the life of eligible chain-drive garage door openers and is a practical fix for restoring dependable day-to-day operation.
Compatible with LiftMaster ATS211 and ATS211R models