The 4 State Trucks Blog

Ready to transform your rig into a hydraulic powerhouse? A semi truck wetline kit can do the trick. One of these will turn your truck from a normal highway hauler into a workhorse capable of handling tasks in agriculture, construction, bulk hauling or other industries. But if you're already running dump trailers, walking floors, or tankers, then accurately installing a wetline kit ensures solid performance and profitability. Incorrect installs can lead to thousands of dollars down the drain on r …

When it comes to your semi truck’s power system, batteries are the lifeline for nearly any application, from your lighting to your hotel loads (interior appliances). In this brief guide, we’ll cover how to swap out and maintain your commercial truck’s batteries, as well as what battery cover boxes you should buy for maximum protection. Here’s the fastest way: disconnect the negative cables first, remove the old batteries, clean off the connections, and install a matching …

Getting the right tire inflation pressure on your semi-truck can prevent underinflation (wearing down the tires and increasing rolling resistance) and overinflation (blowout on the side of the road). Adding the appropriate amount of air pressure to your big rig will keep you and other passerby drivers safe. To find the correct PSI for your tires, check your owner’s manual, or find it on the commercial vehicle’s tire placard. The number is based on various factors, like:  Weight …

Aside from your truck's engine, heavy duty shocks are among the most critical parts that that affect ride quality, suspension performance, and the amount of wear on tires. Here’s a quick rundown of the best aftermarket shock dampeners that we sell at 4 State Trucks, as well as semi truck shock technology, signs of failure, and buying tips.  How Shock Absorbers Work on a Semi Truck  Your leaf springs and air ride parts handle weight support and vertical movement. But your shocks m …

Looking to add some power to your truck’s voice and match your exterior chrome-polished aesthetic? Find the best air horn for your semi truck. In this guide, we’ll cover the top semi air horn brands, materials/finishes, mounting options, decibals, sound profiles, and more. Why Add an Air Horn to Your Big Rig?  The biggest reason? It adds to your truck's character. Just like high-pitch whistles or bells, they're a fun accessory to have on your truck. Air horns and train horns o …