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

Perfect. Mine had a worn out bushing right below the sprocket. A few you tube video and the job was done in 1 hour.

Perfect fit and easy to install! Exactly what I needed.

Exactly what I needed, even if I didnt need all the parts included. Common failure is sheering of shaft right below sprocket. Easy fix done with opener still attached.

Arrived quickly and as expected.

Everything worked perfect . I had no problems with the parts. I would recommend it to someone . Thanks for equipment .

Everything was as sold. Completely satisfied

Does exactly what it says it does. It is a perfect fit and an easy install. If I can do it anyone can do it.

This product was received quickly which was important since we couldnt use our garage. It came with detailed instructions that made it easy for a DIY install and were back up and the door is purring again!

The part works well and it has all the pieces you need. However, the instructions that come with it are rather lousy. I recommend using the instructions - including photos - at dl.dropbox dot com/u/1347192/lifter/liftmaster_repair.html when doing this. It helped immensely!

Kit replaced all gears and shaft in old Craftsman door opener without any issues. Highly recommend!