Garage door shakes when closing?
Updated June 2026 · 5 min read
Stop using the door if it's shaking violently, dropping fast, or making a loud bang. A broken spring or cable can fail completely the next time you cycle it.
A garage door should glide down in one smooth motion. When it shakes, vibrates, shudders, or "bounces" on the way down, one of six things is usually wrong. Here's how to identify which and what to do about it.
1. Unbalanced springs
The #1 cause. If one torsion spring has lost tension (or one of a pair has snapped), the door drops unevenly and shakes. Pull the disengage cord and lift the door manually to chest height — if it falls or rises on its own, the springs are out of balance. Call a pro; spring work is dangerous.
2. Worn rollers
When rollers wear out, they chatter in the track. You'll see a shimmy on the way down as each roller bumps along. Replacement is straightforward and the door immediately runs smoother.
3. Loose track brackets
The vertical track bolts to the wall with two or three brackets per side. Vibration loosens them over years. Tighten the lag bolts where the track meets the wall — but stop if the track itself is bent.
4. Worn or damaged hinges
Each section of a sectional door pivots on hinges. A cracked hinge causes that section to shift sideways during travel — visible shake from inside. $5 part each, 10 minutes to replace.
5. Bent track
A car bumper, ladder, or shifting house can put a kink in the track. Once the rollers hit that spot they jump and the whole door shudders. A bent track must be straightened or replaced; forcing the door will derail the cable.
6. Failing opener
If the opener motor is dying, it delivers uneven pulling force and the chain or belt jerks the door. Usually accompanied by grinding or clicking from the motor head.
The balance test (60 seconds)
The fastest way to know if it's the springs: with the door closed, pull the red disengage cord on the opener rail. Lift the door manually to about waist height and let go. A balanced door stays put. If it slams down or shoots up, your spring tension is off — that's why it shakes when closing. This is the most common cause we see in Denver, especially on doors over 7 years old where one of the original springs has quietly worn out.
We diagnose shake/vibration issues for free with any repair in Denver, Aurora, Lakewood, Centennial, and the rest of the Front Range. Most are fixed in a single visit.