Joe Costello posted a question about liftmaster Chamberlain Garage Door Opener Transmitter 300MC:
"worm gear is good. drive gear is worn out"
Joe Costello posted a question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+:
"worm gear is okay, but the gear running the chain is worn bad enough it doesn't open door"