Shop Peterbilt 379 Air Springs & Level Valves

Peterbilt 379 Air Springs & Level Valves

A smooth ride starts with a solid suspension system and that means keeping your air springs and leveling valves in top shape. Our collection of Peterbilt 379 air springs and level valves is designed to help you maintain consistent ride height, reduce wear and tear, and improve comfort behind the wheel. Whether you're running a Flex Air, Air Trac, or Low Air Leaf suspension, we’ve got the parts that match your setup and keep your truck running steady and level.

Why Semi Truck Air Springs & Leveling Valves Matter

Air springs (or cab air bags) help absorb road shock, reduce vibration, and protect your frame and drivetrain. A functional commercial truck leveling valve ensures your suspension ride height stays exactly where it should be even when hauling heavy loads or traveling across uneven ground. The Peterbilt 379 sleeper leveling valve specifically helps maintain cab balance and sleeping comfort, especially over long hauls. A reliable semi-truck leveling valve keeps your rear suspension from sagging and protects tires from premature wear. We carry a complete lineup of components, including: - Direct-fit aftermarket cab leveling valves - Peterbilt level valve rods and hardware kits - Replacement valve kits for air suspension systems - Heavy-duty air springs for both drive and cab suspensions These semi truck parts are built to OEM or better standards, ensuring long-lasting performance and a smooth, balanced ride. Whether you're replacing a worn-out leaf suspension setup or fine-tuning your Peterbilt 379 air ride system, we have the parts to help you get it done right. So if you're noticing uneven ride height, rough handling, or cab sway don’t wait. Shop for some of our aftermarket Peterbilt 379 air springs and leveling valves now and get your suspension back in top condition.

Frequently Asked Questions About Peterbilt 379 Air Springs & Level Valves

Will these air springs fit my specific year Peterbilt 379?

Most air springs and level valves listed in this category are compatible with Peterbilt 379 models from 1987 to 2007. However, there can be variations based on your truck's suspension configuration (Airleaf, Air Trac, or traditional air ride). Always check the product description for specific year ranges and verify your suspension type before ordering. If you're unsure, contact us with your VIN number and we can help confirm compatibility.

How difficult is it to install air springs and level valves myself?

Air spring replacement typically requires basic mechanical skills and can be completed in 2-4 hours per axle. You'll need jack stands, basic hand tools, and ideally an impact wrench. Level valve installation is more complex and requires proper adjustment to maintain correct ride height. Many drivers can handle air spring replacement, but level valve installation and calibration often benefit from professional installation to ensure proper function and avoid suspension damage.

What's the difference between OEM and aftermarket air springs for my 379?

OEM air springs use original Firestone or Goodyear rubber compounds and typically last 200,000-300,000 miles under normal conditions. Quality aftermarket options from brands like Hendrickson and Ridewell offer similar durability at 20-30% less cost. The main differences are warranty length (OEM usually offers 2-3 years vs 1-2 years aftermarket) and exact mounting specifications. Both options work well, but stick with reputable brands to avoid premature failures common with budget imports.

How do I know when my level valves need replacement versus just adjustment?

Signs of a failing level valve include uneven ride height side-to-side, air bags that won't hold pressure overnight, or constant air cycling while parked. Before replacing, check the linkage for bent rods or worn bushings - these $10-20 parts often solve the problem. If the valve body shows external damage, leaks air from the exhaust port continuously, or won't maintain consistent height after linkage repair, replacement is necessary. A properly functioning level valve should only make minor adjustments while driving.

Can I upgrade to heavy-duty air springs if I frequently haul maximum loads?

Yes, heavy-duty air springs rated for higher PSI (typically 120 PSI vs standard 100 PSI) are available for 379s that regularly run at or near 80,000 lbs. These upgraded springs feature reinforced rubber compounds and additional fabric plies. However, you must ensure your air system components (valves, gauges, and compressor) can handle the increased pressure. Most 379s can accommodate this upgrade, but you may need to replace your height control valves and pressure protection valves to match the new specifications.