Peterbilt 389 Shock Absorbers

Frequently Asked Questions About Peterbilt 389 Shock Absorbers

Will these shock absorbers fit my Peterbilt 389 without modification?

Shock absorbers vary by axle position (front or rear), suspension type, and the year of your Peterbilt 389, so fitment depends on matching the correct part number to your truck's specifications. Always check the listed application details or compare against your OEM part number before ordering to ensure a direct bolt-on fit.

What is the difference between OEM and aftermarket shock absorbers for my truck?

OEM shock absorbers are built to the original manufacturer's exact specifications and are a safe choice if you want to match what came on your truck from the factory. Aftermarket options can offer similar or improved performance, often at a lower price point, but quality can vary between brands, so it helps to stick with reputable manufacturers known for heavy-duty truck applications.

How do I know when my shocks need to be replaced?

Common signs include excessive bouncing, uneven tire wear, a rougher ride than usual, visible fluid leaking from the shock body, or physical damage such as dents or a bent shaft. If you notice any of these symptoms, it is a good idea to inspect the shocks and replace them in pairs (both sides of an axle) to maintain even handling.

Can I install these shock absorbers myself, or should I have a professional do it?

Replacing shock absorbers is a fairly common maintenance task and many owner-operators with mechanical experience and the right tools can do it in a home or shop garage. That said, because shocks affect ride control and handling, if you are unsure about proper torque specs or mounting hardware, having a qualified technician handle the install is a safer bet.

Do these shocks come with the mounting hardware and bushings included?

This varies by product and manufacturer, so check the specific product listing for details on what is included in the box. If bushings or mounting hardware are not included, you can typically source them separately, and we recommend inspecting your existing bushings during replacement since worn bushings can affect ride quality even with new shocks installed.