U-Bolts are a crucial part to your truck’s suspension. These bolts keep the leaf springs of your suspension tied together. The heavier the load, the more pressure the leaf spring and u-bolt take, thus causing problems. If they were to break off, that could spell doom to not only your load, but potentially your rig. That’s why you should just make a habit of checking them before every trip. Loose U-Bolts When checking your u-bolts, there are several factors to consider. If your u-bolts are loose in any way, please tighten them as soon as you can. Tightening them won’t damage them at all. If you don’t properly tighten them, it could just pop right off and ruin your truck’s suspension. Cracked U-Bolt Another issue that can arise with u-bolts are cracks.