What Is the Drag Link on a Semi Truck?

The drag link, also known as a steering drag link or tie rod, is a component of the steering system on a semi-truck. It connects the steering box to the wheel hub, making it an important part of the truck’s steering system. Without it, you wouldn’t be able to steer your truck and would be unable to drive it safely.

The drag link works by transferring force from the steering box to the wheel hub. This allows the driver to control the direction of the truck by turning the wheel. The drag link is usually made from steel and is designed to withstand heavy loads and vibration while still providing accurate and responsive steering. It also helps reduce wear and tear on other components such as ball joints, tie rods, and other suspension components.

The drag link is connected at one end to the pitman arm on the steering box and at the other end to either a bell crank or idler arm. The bell crank or idler arm then connects to either side of the hub assembly in order for it to work properly. When inspecting your drag link, look for signs of wear and damage such as loose bolts or cracked housings. You should also make sure that all parts are properly lubricated with grease in order to prevent corrosion and ensure smooth operation.

When replacing your drag link, always use OEM parts that are designed specifically for your vehicle’s make and model. This will ensure that they fit correctly and provide optimal performance over time. Additionally, you should always make sure that you have a qualified mechanic do any repairs or replacements.


In conclusion, The Drag Link on a Semi Truck is an essential part of its steering system which connects its steering box with its wheel hub in order to provide responsive control over its direction while driving on roads or highways. It’s important to inspect this component regularly for signs of wear and damage, using OEM parts when needed in order for it to perform optimally.

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Susan Delgado