There are two types of pulleys.
Garage door vibrates closing.
Close the door and hold a block of wood against the doorstop.
If you hear a garage door grinding noise it could be the rollers.
The door track rollers move each time you open or close the door leading to a lot of movement and causing wear.
If your garage door shakes when opening or closing or sounds like it is going to fall off the track the problem is most often the pulleys.
Vibration is the cause of most noise problems associated with garage door openers.
Tighten one adjustable wrench onto the curved latch side of the plate to hold it while you bend the tang.
This wear could damage the roller surface causing them not to roll correctly.
Vibration transfers through the steel framework of the opener and through the home s framing studs and drywall.
Then secure the door stop with 1 1 4 in.