Originally Posted by bekins01ram

find some hard plastic/ rubber for between the metal bracket on the truck and the metal bracket on the light. I'm assuming on my offroad lights, the included rubber rings, were to absorb some vibration, instead of letting the light bounce like crazy when the truck hits a bump. Old shoe sole, cut about 1/4 inch thick into a ring...umm piece of the sidewall of an old tire, cut into a ring...something kinda hard, not too spongey. My lights still bounce a little, but the rubber rings absorb some of the smaller vibrations in the road.

Here's a close up of the rubber rings on my lights. They were included with the light, so I imagine they serve a purpose. :P Either to reduce bounciness or prevent the light from spinning left to right, im not sure. After sinching the bolt down hard as I could, smashing the rubber ring nice n tight, there's not much vibration/ bounce to 'em. Just when I hit a decent size bump in the road.
One more edit: An idea if you dont want to cut your own rubber rings...try n find some of the rubber o-rings you'd put in like a water hose fitting, like in the back of your washer. Should be big enough, to fit the bolt thru, and have plenty of surface area to reduce vibrations, and shouldn't deteriorate.

Originally Posted by wyomingdodge7

I saw someone mount them sideways into the big solid steel upright once. Very sturdy, but some people weren't fans... Just an idea.

Originally Posted by kejobe

I think that having them mounted on the grille is adding to the bounce. How stable is yours? I know that mine isnt very sturdy and moves pretty easy.