Originally Posted by derekroth91
So springs/coils are actually lifting the vehicle but longer shocks may be required to help take abuse from bumpy rides?
Stock shocks are aspecific length in order to work without bottoming or limiting suspensoin travel. If you put a 4" lift under your vehicle, you will need a shock 4" longer than stock in order to keep it the right length.
Shocks come in a multitude of stiffnesses (is that even a word?). Too soft of a shock won't dampen enough leading to wallowing at stops and poor handling. Too stiff a shock will make the ride too harsh and beat on the mounts.
Some are adjustable.
Some are gas charged.
They keep the chassis from bouncing while driving. If your curious as to how they work, try removing yours from the front, then bouncing the corner up and down. If you have coil springs, the front of the rig will continue to bounce after you stop pushing on it. This vertical motion can effect the safety of the vehicle.