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

comes with all parts discribed in manuel, i personally didnt need all the parts.

great product.

My garage door opener started behaving very strangely and my first instinct was to simply go out and buy a new one. But eventually my frugal side kicked-in and I decided to take it all apart and see if I could fix it . . . boy what a mess that was! Long story short, I found this repair kit on Amazon and ordered it . . . it arrived in ONE DAY!! The very next day my opener was rebuilt, and re-installed looking and working just like new for a total cost of $26 and a few hours of work! Cant beat that! The job itself is very messy (lots of oil and grease from the rail and chain, and inside the unit) and can be quite fiddly if youre not handy. The instructions are pretty good but I recommend using a digital camera to shoot pictures of everything you take apart BEFORE you take them apart . . . . . that way you know how to re-assemble them if the instructions are a bit vague! Fortunately Im above average in terms of handiness so I was able to complete the entire job including pulling down the entire assembly and complete re-assembly and calibration in a little over 4 hours. Now that I know how to do it, I could probably do it again in half that time. Overall, well worth it and definitely worth saving the extra $150 for a new base-model unit.

Garage door opener works like new!

Worked perfectly. Instructions need to be tweaked. Read other reviews and got some pointers that made it easier. Highly recommended.

It works great!

Great price, shipped quick, detailed instructions, came with parts I wouldnt have thought to get!! Door runs great!!! Very impressed!!

Worked perfectly! Easy to install

Nothing to it, after taking the old part off, 15 minutes for that. Took part out of plastic bag and within another 15 minutes I was done. The most difficult part was adjusting the door by using the right and left adjustment to level the door.

Not too difficult to install yourself. This was my first time attempting any garage door repair and it went smoothly. Follow the instructions. I also watched a couple of YouTube videos showing the process as well. The product is an excellent price and value!