Suspension Services for Commercial Trucks & Trailers

Heavy-Duty Suspension Repairs, Replacements & Diagnostics | STTR, Inc. – Pacific, WA

A strong, stable suspension isn’t just about ride comfort—it’s critical to the safety, handling, and load-bearing capability of your truck or trailer. At Sound Truck & Trailer Repair (STTR, Inc.), we specialize in suspension services for semi trucks, heavy- and medium-duty vehicles, and commercial trailers, helping you maintain maximum performance on every haul.

🚛 Complete Suspension System Services

From worn shocks to broken leaf springs, our team can diagnose and repair virtually every suspension issue affecting your rig. We service both air ride and mechanical suspensions to keep your vehicle compliant, safe, and road-ready.

Our suspension services include:

• Suspension system diagnostics

• Air bag & air spring replacement

• Leaf spring & coil spring repairs

• Shock absorber replacement

• Hanger, shackle & bushing repairs

• Torque rods & trailing arms

• Ride height adjustments

• Suspension alignment & leveling

• Frame & suspension inspections

Whether you’re dealing with uneven tire wear, poor ride quality, or handling issues under load, STTR gets to the root of the problem—fast.

🧰 Trailer Suspension Services

Commercial trailers take a beating, especially under heavy loads. We service suspension systems on:

• Dry vans

• Reefers

• Flatbeds & lowboys

• Dump trailers & tankers

• Utility & custom trailers

Common trailer suspension repairs include:

• Equalizer rebuilds

• Spring hanger and bracket repair

• Air ride system diagnostics and valve replacement

• Axle alignment and leveling adjustments

⚠️ Signs You Need Suspension Service

• Uneven tire wear or premature tire failure

• Excessive bouncing or swaying while driving

• Harsh ride or bottoming out

• Loose steering or poor handling

• Visible sagging or leaning under load

• Air system won’t maintain ride height

If you notice any of these warning signs, it’s time to have your suspension system inspected by the professionals at STTR.

🛠 Fleet Suspension Services

We provide fleet maintenance and repair solutions tailored to your schedule. Whether you need scheduled inspections or emergency suspension work, STTR helps you stay safe, DOT-compliant, and operational.

📍 Schedule Service in Pacific, WA | Monday–Friday, 8 AM to 5 PM

Our suspension services are available at our Pacific location:

• 898 Valentine Ave SE, Pacific, WA 98047

• Open Monday through Friday, 8:00 AM – 5:00 PM

• Serving truckers and fleets across the Puget Sound region

Why Choose STTR for Suspension Work?

• ✔ Heavy-Duty Truck & Trailer Experts

• ✔ Air & Mechanical Suspension Systems

• ✔ Fast, Accurate Diagnostics

• ✔ DOT-Compliant Repairs

• ✔ State of the Art Alignment Machine

• ✔ Trusted Since 2008 by Fleet Managers & Owner-Operators

📞 Call (253) 691-6645 to schedule your suspension inspection or repair today. Or visit www.STTRWA.com to request service online.
Stay stable. Stay supported. Trust STTR to keep your suspension strong.