Frequently Asked Questions About Peterbilt 387 Front Axle Air Ride Kits

Will these air ride kits fit my specific year Peterbilt 387, and are there any model variations I should know about?

Our front axle air ride kits are designed to fit Peterbilt 387 models from 2000-2010. However, there are important variations to consider: trucks with set-back front axles require different mounting brackets than standard set-forward axles. Additionally, if your 387 has been modified with aftermarket suspensions or has a heavy-duty front axle rating above 14,600 lbs, you may need additional components. We recommend checking your VIN-specific build sheet or calling our tech support at 1-888-875-2425 with your truck's serial number for exact fitment confirmation.

How difficult is the installation, and can I do it myself or do I need a professional shop?

Installation typically takes 6-8 hours for an experienced technician or 10-12 hours for a skilled DIY mechanic. The job requires basic air system knowledge, including proper air line routing and DOT-approved fittings. You'll need standard shop tools plus a few specialized items: spring compressors, air system pressure gauges, and torque wrenches capable of 450-500 ft-lbs for the U-bolt specifications. The most challenging aspects are safely removing the original steel springs and ensuring proper ride height adjustment. While many owner-operators successfully complete this installation, we recommend professional installation if you're not comfortable working with compressed air systems or heavy suspension components.

What's the actual ride quality improvement, and will it help with driver fatigue on long hauls?

Drivers typically report a 60-70% reduction in cab bounce and vibration compared to stock leaf springs, with the most noticeable improvement on rough interstate sections and construction zones. The air ride system maintains consistent ride height regardless of load, eliminating the harsh bottoming-out common with worn leaf springs. Most operators notice reduced lower back strain and less fatigue on 500+ mile days. The system also extends tire life by 15-20% due to better axle articulation and reduced hop. Keep in mind that optimal performance requires maintaining 90-120 PSI in the bags and adjusting the ride height valves properly during installation.

What maintenance is required, and what are common failure points I should watch for?

Air ride systems require minimal but important maintenance: inspect air bags every 90 days for cracks or abrasion, check all fittings for leaks using soapy water, and drain moisture from the system weekly. The air bags typically last 300,000-500,000 miles with proper care but can fail prematurely if rubbing against components or exposed to petroleum products. Common issues include height control valve linkage wear (check every 6 months), air line chafing at frame contact points, and shock absorber degradation after 200,000 miles. Budget approximately $200-300 annually for preventive maintenance parts. Most failures give warning signs like gradual air loss or uneven ride height before complete failure.

Do these kits meet DOT regulations, and will they affect my truck's warranty or resale value?

All our air ride conversion kits meet or exceed FMVSS-121 requirements and include DOT-certified components. The kits won't void your Peterbilt chassis warranty as they're considered an approved suspension modification, though you should notify your dealer of the change. Regarding resale value, air ride conversions typically add $2,000-3,500 to your truck's value, as they're highly desired by second owners. The conversion is fully reversible if needed, though most buyers specifically seek trucks with air ride. We provide complete documentation including component certifications and installation records that you should keep with your vehicle maintenance files for DOT inspections and resale purposes.