How a Suspension System Works:
If the truck's axle was attached directly to the frame, without any type of suspension springs, you'd feel every little crack in the road because nothing would be in place to absorb the impact. In fact, you wouldn't be able to control the truck, because its tires would bounce off the ground whenever you hit a bump.
Leaf Spring Suspension System:
One end of a leaf spring is attached to the frame, and the other end is attached to a shackle that can move, allowing the spring's overall length to vary as its arch flexes (when carrying a load or traveling over bumps).
Leaf Spring Comfort Factor:
A stack of leaf springs supports a heavier load by making it more difficult for the main leaf to flex and preventing the truck from bottoming out. The trade-off is a stiffer ride when the truck bed is empty, because without a load, very little flex takes place.
Coil Spring Suspension Systems:
Truck Rear Suspension Systems:
Dodge broke from tradition in 2009 Ram 1500s, installing a coil spring suspension system on the rear with promises that the system would carry a load without compromising comfort. We're a few years into that setup now and it appears to be working as planned -- our 2013 Dodge Ram 1500 review offers opinions about the truck's ride and capabilities.