Chamberlain Powerdrive PD422D 1/2 HP Security Plus Screw Drive Garage Door Opener "replace nylon gear garage door" Questions

nylon drive gear in your unit has been stripped. This can be replaced and is common in openers. You can get a replacement at chamberlain.com. It does take moderate skill to do and should take about an

...nylon gear is beneath the exterior chain gear. I am looking for information on how to replace it, if I can find the part. If you decide to look at yours, unplug the power and remove the sheet metal ...