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Kenworth T660 Air Springs & Level Valves
Frequently Asked Questions About Kenworth T660 Air Springs & Level Valves
Will these air springs and level valves fit my specific year model Kenworth T660?
Our air springs and level valves are designed to fit Kenworth T660 models from 2008-2015. However, compatibility can vary based on your truck's suspension configuration (Airglide, AG400L, or proprietary systems). We recommend checking your existing part numbers or contacting our support team with your VIN to ensure proper fitment. Some aftermarket modifications may affect compatibility.
How difficult is it to install air springs and level valves, and what tools do I need?
Installation typically takes 2-4 hours per axle for experienced mechanics. You'll need basic hand tools, jack stands, and an air impact wrench. The most challenging aspect is often accessing the upper mounting bolts and ensuring proper air line routing. Level valve installation requires careful adjustment to maintain proper ride height - we recommend having a measuring tape and following the manufacturer's specific ride height specifications for your T660.
What's the difference between OEM and aftermarket air springs for the T660?
OEM air springs typically use reinforced rubber compounds with crimped steel end plates, while quality aftermarket options often feature similar construction at 30-40% less cost. The main differences are warranty coverage (OEM usually 2 years, aftermarket 1 year) and rubber compound formulation. Reputable aftermarket brands like Firestone and ContiTech meet or exceed OEM specifications for burst pressure and cycle life.
How do I know when my level valves need replacement versus just adjustment?
Signs of failing level valves include uneven ride height side-to-side, constant air bleeding, or failure to maintain height under load. Before replacement, check the linkage for bent rods or worn bushings - these $10-20 parts often solve the issue. If the valve still leaks after linkage repair or won't hold consistent pressure, replacement is necessary. A properly functioning valve should maintain ride height within 1/4 inch variance.
Can I replace just one air spring, or should I always replace them in pairs?
While you can technically replace a single failed air spring, we strongly recommend replacing them in axle pairs. Mismatched air springs (even same brand with different manufacture dates) can cause uneven suspension response, premature wear on the newer spring, and potential handling issues. The cost difference is minimal when considering labor savings and long-term reliability. Exception: if one spring failed due to road debris damage and the other is less than 6 months old.