Frequently Asked Questions About Peterbilt 359 Front Axle Air Ride Kits

Will these air ride kits fit my specific year Peterbilt 359?

Our front axle air ride kits are designed to fit Peterbilt 359 models from 1967 through 1987. However, there are variations depending on your truck's configuration. Extended hood models and trucks with set-back front axles may require additional brackets or modifications. We recommend checking your front axle model number (typically Eaton or Dana) before ordering, as some kits are axle-specific. If you're unsure about compatibility, contact us with your VIN or axle specifications for verification.

How difficult is the installation, and what tools do I need?

Installation typically takes 6-8 hours for someone with moderate mechanical experience. You'll need basic hand tools, a floor jack, jack stands, and an air compressor for testing. The most challenging part is usually removing the existing leaf springs and mounting the new air bag brackets. Some drilling may be required depending on your frame configuration. Many customers choose professional installation, which usually costs between $800-$1,200. All kits include detailed instructions, and we offer phone support during business hours.

What's included in the complete kit, and will I need additional parts?

Complete kits include air bags, mounting brackets, air lines, fittings, a height control valve, and hardware. However, you may need additional components depending on your setup. If your truck doesn't have an existing air system, you'll need an air compressor and tank. Some older 359s require frame reinforcement plates (sold separately). We also recommend adding an in-cab gauge kit for monitoring air pressure, though this is optional. Shock absorbers are not included but are highly recommended for optimal ride quality.

How much will this improve my ride quality, and are there any downsides?

Most drivers report a 60-70% improvement in ride quality, especially on rough roads. The air ride system significantly reduces cab shake, driver fatigue, and wear on other components. The main trade-offs are slightly increased maintenance (checking air pressure, occasional air bag replacement every 5-7 years) and a small reduction in ground clearance (typically 1-2 inches). Some drivers also note that air ride can feel "floaty" when unloaded, though this can be adjusted with proper air pressure settings.

What's the difference between the economy and premium kit options?

Economy kits use single convoluted air bags and basic steel brackets, suitable for trucks under 12,000 lbs front axle weight. Premium kits feature double convoluted air bags rated for up to 17,000 lbs, heavy-duty powder-coated brackets, and stainless steel air lines. Premium kits also include lifetime warranty on brackets and a 3-year warranty on air bags, compared to 1-year coverage on economy kits. For daily drivers or heavy-haul applications, we strongly recommend the premium option for longevity and performance.