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

Once installed the part worked perfectly. However the mounting holes were not tapped for the mounting screws so I had to do the tapping before installation. The instructions do not mention this at all! Anyone attempting to install needs to be aware of this unless they use self-tapping screws.

Exact replacement part that I needed, worked as expected. By doing the repair myself, it saved me a service call.

Don’t use the two provided set screws that hold the collar on the end of the motor shaft. Use the set screws from your old parts. The new ones are too long and broke my RPM sensor which is another $15. And you’ll need some small nuts and bolts to use in the holes where the sprocket plate attaches to the housing. For whatever reason the holes are not threaded.

Works as designed.

Quality parts and acceptable instructions. I recommend finding a UTube video which actually walks you through the gear and sprocket replacement process.

Saved me from a service charge and labor and probably more money for the part

We tried to used this with a you tube guy didnt work had a garage guy come out to fix. He said if it had worked it would have lasted a week because we needed to greese it. Lesson learned

Worked like a charm...

easy installation

I really dont have anything bad to say about this even came with instructions. All said and done it fix my garage door