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Kenworth T800 Air Springs & Level Valves
Frequently Asked Questions About Kenworth T800 Air Springs & Level Valves
Will these air springs fit my specific year model Kenworth T800?
Air spring compatibility for the Kenworth T800 varies by production year and suspension configuration. Models from 1986-2005 typically use different mounting patterns than 2006+ models. Always verify your truck's VIN and existing air spring part numbers before ordering. Most T800s use either Firestone W01-358-9622 or Goodyear 1R11-221 style springs, but cab-over-engine models and heavy-haul configurations may require specialized options. Contact our support team with your VIN for exact fitment verification.
How difficult is it to replace air springs and level valves on a T800?
Air spring replacement typically takes 2-3 hours per axle for experienced mechanics. The job requires safely supporting the frame, removing wheels, and disconnecting air lines. Level valve installation adds another 1-2 hours and requires careful adjustment to maintain proper ride height. Common challenges include rusted mounting bolts, cramped working space near the frame rails, and proper torque specifications (typically 35-45 ft-lbs for mounting bolts). Having an impact wrench, penetrating oil, and proper jack stands is essential. First-time installers should budget extra time for learning the air line routing.
What's the difference between OEM and aftermarket air springs for my T800?
OEM Kenworth air springs are manufactured by Firestone or Continental and typically cost 40-60% more than quality aftermarket options. Aftermarket brands like Goodyear, Firestone, and Air Lift use the same rubber compounds and steel mounting plates but may have different warranty terms. OEM springs usually carry a 3-year warranty while aftermarket options range from 1-2 years. Performance-wise, most drivers report no noticeable difference in ride quality or longevity between OEM and premium aftermarket springs when properly maintained.
How do I know if my level valve needs replacement versus just adjustment?
A properly functioning level valve should maintain consistent ride height within 1/2 inch when loaded or empty. Signs of failure include constant air bleeding, truck leaning to one side, excessive bouncing, or inability to maintain pressure. Before replacing, try adjusting the linkage arm - it should be perpendicular to the frame at ride height. If adjustment doesn't resolve issues, check for internal seal damage by disconnecting air lines and checking for leaks. Level valves typically last 200,000-300,000 miles but fail sooner in severe-duty applications or areas with heavy road salt exposure.
Can I upgrade to heavy-duty air springs if I frequently haul maximum loads?
Yes, heavy-duty air spring upgrades are available for T800s regularly running at or near 80,000 lbs GVW. Options include double-convoluted designs rated for 20,000-23,000 lbs per spring versus standard 17,000 lb ratings. These require the same mounting points but provide 15-20% more load capacity and typically last longer under heavy use. Popular upgrades include Firestone W01-358-9780 for rear applications and reinforced cab air springs for severe-duty vocational trucks. Ensure your compressor and air system can handle the increased volume requirements of larger springs.