The front coil springs on your Ford Ranger sit up inside of the coil bucket over a couple of ears, tabs, or whatever you want to call them. They keep the coil from popping out sideways. Ford didn’t design these trucks to do hard wheeling, so if the front axle drops far enough flexing the suspension, there is a chance the coil could get pulled out from the upper mount. The chances of this happening increase quite a bit if you’re using extended radius arms.
Some people make a coil retainer;
But honestly, a hose clamp is the cheapest, simplest solution. They’re actually stronger than you may think. Just make sure they’re tight or you’ll hear a rattle in the front suspension.