Shock And Strut Replacement at Johnny's Automotive

Shocks and struts don't hold your car up. The springs do that. A damper's job is controlling what the spring does next, so the body settles once after a bump instead of bouncing three or four more times. A worn damper still lets the car sit at the correct height. It has just stopped managing the motion.

That's why this wear is so easy to miss. It shows up over years, never overnight. First the car floats a little on the highway. Then the nose dives further under braking than it used to. Then the tires start wearing in scallops or patches, because the wheel is bouncing on the road instead of staying pressed to it. Nobody notices any single day of that. You just adapt.

The old bounce test, where you push down on a fender and count the rebounds, catches the very worst ones and misses almost everything else. Plenty of dampers that pass it lost real control a long time ago. What actually tells the story is a body that's weeping or leaking oil, a mount that's broken down, how the strut behaves through its travel, and the tire wear on that same corner.

The difference in one sentence: a shock is a standalone damper mounted next to the spring, while a strut is a damper built into an assembly that also helps hold the wheel in position.

We replace dampers as a pair on the same axle. A fresh one on the left with a tired one on the right makes the car brake unevenly and loads the two tires differently, which is a strange way to spend money. And because struts help set wheel angles, strut work gets an alignment afterward. We say that up front so it's part of the number you agreed to, not a surprise at pickup.