Garage door makes noise but won’t open - gear sprocket replacement

Sears Craftsman LiftMaster ½ hp garage door opener is making noise but doesn’t move, so we’re going to replace the gear sprocket assembly. If your garage door is making a loud noise but isn’t working, this is a DIY solution so you don’t have to replace the entire opener. I’ll walk you through how to replace the gear and sprocket in your garage door. Sprocket replacement is messy, but if you have a Chamberlain or LiftMaster opener, this solution will work. This solution also works if you have a broken garage door gear sprocket.
0:00 Intro
1:58 Remove the housing
2:46 Rant about troubleshooting
3:30 Loosen and remove the chain
4:09 Remove the damaged sprocket assembly
4:58 Grease up the new sprocket
5:21 Drill the pilot holes in the new sprocket to give you threads
6:13 Install the new sprocket ad reattach chain
6:50 Test, create a new problem, and then fix the jam
7:39 Adjust your limits so your door opens and closes correctly
7:50 Final thoughts and take-aways
Replacement Sprocket part: amzn.to/42T2B3V (I only replaced the main sprocket and didn’t use any of the other parts of this kit other than the grease)
Power Drill with driver bits: amzn.to/42NOblH
6 ft. ladder: amzn.to/3wBrt3T
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Other items you’ll need:
-a ladder
-a socket set
-a wrench set
-flat-head screwdriver
-the patience of a monk
-a flask of something strong (optional)