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Peterbilt 388 Front Axle Air Ride Kits
Frequently Asked Questions About Peterbilt 388 Front Axle Air Ride Kits
Will these air ride kits fit my specific year model Peterbilt 388?
Our front axle air ride kits are designed to fit Peterbilt 388 models from 2006 through 2015. However, compatibility can vary based on your truck's original suspension configuration and front axle weight rating. We recommend checking your truck's build sheet or contacting us with your VIN to confirm fitment. Some 2016 model year trucks may also be compatible if they retain the 388 chassis design.
What tools and experience level are needed for installation?
Installing a front axle air ride kit requires intermediate to advanced mechanical skills and specialized tools including air tools, torque wrenches, and suspension spring compressors. Most professional shops complete the installation in 6-8 hours. Key challenges include proper alignment of air bags, routing air lines safely away from heat sources, and ensuring correct ride height calibration. We strongly recommend professional installation unless you have experience with heavy truck suspension systems.
How much will the air ride system affect my front axle weight capacity?
Front axle air ride kits typically maintain your truck's original weight rating when properly installed. Most kits are rated for 12,000 to 20,000 pound front axles. The air bags themselves add approximately 40-60 pounds to the front suspension weight. Always verify that your selected kit matches or exceeds your front axle's factory weight rating, which can be found on your door jamb sticker or axle identification tag.
What maintenance is required and how long do the air bags typically last?
Air bags generally last 100,000 to 200,000 miles with proper maintenance. Required maintenance includes checking air pressure weekly, inspecting for leaks monthly, and keeping the bags clean from road chemicals and debris. Most drivers report replacing air bags every 3-5 years depending on usage conditions. Common failure points include the crimped ends and areas exposed to excessive heat from exhaust components.
Will I need additional components beyond the basic kit?
Most kits include air bags, brackets, and basic fittings, but you may need additional components for a complete installation. Common add-ons include: height control valves ($150-300), air line kit if extending to rear system ($50-100), pressure gauges for cab monitoring ($75-150), and shock absorbers if yours are worn ($200-400 per pair). Some installations also require modified or extended brake lines depending on your truck's configuration.