What happens under your car while you’re driving in it? YouTuber ChrisFix put cameras under his car to see what was happening when he drove his 14 year old shock absorbers on a bumpy roadway, a highway, in stop and go traffic, and over speed bumps. Then he records what it looks like after new shocks are installed.

Shock absorbers do just that, they control the suspension springs to keep your car from bouncing and vibrating. When they get old, they need to be replaced. ChrisFix’s old shocks are old, so the performance difference can be easily seen in the before and after footage.

Watch these next: How the differential gear works and why cars need them, Kathryn DiMaria rebuilds her Pontiac Fiero, and How to drive the Fold Model T.

via The Awesomer.

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