* Thunking or banging: This is a common sound, especially when going over bumps or potholes. It indicates the shock absorber is failing to dampen the movement of the suspension.
* Knocking: Similar to thunking, but often sharper and more metallic-sounding. This could indicate a worn-out bushing or a more serious internal problem within the shock.
* Squealing or groaning: This often happens when the shock's piston rod is rubbing against its seal, indicating significant wear and tear.
* Rattling: A loose or damaged component within the shock assembly can cause a rattling noise.
* Popping: This could be caused by a broken shock mount or a problem with the suspension itself.
It's important to note that the sound isn't always a direct indicator of *what's* wrong with the shock, just that there *is* something wrong. A proper inspection by a mechanic is necessary for a definitive diagnosis.
