Frequently Asked Questions About Peterbilt 389 Glider Front Axle Air Ride Kits

What year models of Peterbilt 389 gliders are compatible with these air ride kits?

These air ride conversion kits are designed specifically for Peterbilt 389 glider models from 2007 to present. However, compatibility can vary based on your specific front axle configuration. Most kits work with standard 12,000 to 14,600 lb front axles, but trucks with heavy-duty 16,000 lb or 20,000 lb front axles may require different components. We recommend checking your VIN or contacting our support team with your axle specifications to ensure proper fitment.

How difficult is the installation process, and what tools are required?

Installation typically takes 6-10 hours for experienced mechanics and requires standard shop tools including air tools, torque wrenches, and a lift or jack stands. The most challenging aspects involve removing the original leaf spring suspension and properly aligning the new air bags and brackets. You'll need to route new air lines and may need to relocate some existing components. While many owner-operators successfully complete the installation themselves, we recommend professional installation if you're not comfortable with suspension work, as improper installation can affect ride quality and safety.

What's included in a complete air ride conversion kit?

A complete front axle air ride kit typically includes air bags (bellows), upper and lower mounting brackets, shock absorbers, air valves and fittings, air lines, height control valves, and all necessary hardware. Some kits also include air tanks if your truck isn't already equipped. Be aware that basic kits may not include compressors, gauges, or in-cab controls - these are often sold separately. Always verify the complete parts list before ordering to avoid installation delays.

How much weight can these air ride systems support, and will they affect my truck's ride height?

Most air ride kits for Peterbilt 389 gliders support the standard front axle weight ratings from 12,000 to 14,600 pounds. The adjustable nature of air suspension allows you to maintain your preferred ride height within a 3-5 inch range. You can fine-tune the height using the leveling valves, and many drivers appreciate being able to lower the truck for easier entry/exit when parked. The system automatically maintains your set ride height under varying load conditions.

What maintenance is required, and what are common issues to watch for?

Air ride systems require minimal but regular maintenance. Check air bags for cracks or wear every 3 months, inspect air lines for leaks or chafing, and ensure all fittings remain tight. Air bags typically last 100,000-200,000 miles with proper care. Common issues include air leaks at fittings (usually fixed by retightening or replacing O-rings), height control valve adjustment needs, and shock absorber wear after 150,000+ miles. Keep the system clean and avoid over-inflating beyond manufacturer specifications to maximize component life.