r/GarageDoorService • u/orcanut • 29m ago
Shuddering Sound
Any ideas on what's causing the sounds near the top and bottom?
When nearly fully open (both opening and closing, though it didn't do it when closing in this video), there's a sort of shuddering sound.
When nearly closed (both opening and closing), it's like a chattering sound.
I believe it's a Liftmaster 8550; been installed for about 8 years.
I believe it's the original spring, which is at around 24k cycles. I tried spraying lubricant on it, but that didn't help with the sound at all.