Liftmaster 41c4220a Gear and Sprocket Kit for Chamberlain, Sears, Craftsman and LiftMaster 1/3 and 1/2 HP Chain Drive Models

Good ship time, good product, alls well.

This was the perfect fix. My garage door motor would activate and a grinding noise could be heard but there was no movement. The main drive gear had ground off all its teeth. It was a easy fix and it now works great. I discovered my settings had got out of walk over time and the up travel was not stopping the door before it hit the stop. I believe that added strain on the nylon teeth resulting in failure. I set my limits correctly after the install and that took any added strain off the gear. I studied the videos on you tube on both this installation and setting the travel limits. Works as good as new.

It was exactly what I needed. Watched a you tube video walk me through the installation. Works perfectly! Now my wife thinks Im mechanically inclined! Oh no! Thanks. John

Perfect

Exact fit ,original parts ,easy install

It was perfect and easy to install

Worked great!

An exact replacement for our Liftmaster opener. Did the job.

Fast shipment. Good quality product. I was able to swap in the new unit for my Liftmaster 1245R within 30 minutes.

Everything included in package. In my case did not need to replace bearings or worm gear which were included. Just replaced sprocket... all 1 piece assembly.. Saved a bundle. Tip: clamp down carriage on rail before removing chain so it goes back in same spot which will require much less adjustment after installation.