Peterbilt 379 Front Axle Air Ride Kits

Frequently Asked Questions About Peterbilt 379 Front Axle Air Ride Kits

What does a front axle air ride kit actually replace on my Peterbilt 379?

A front axle air ride kit converts the factory front suspension setup, typically a leaf spring configuration, over to an air spring based system. The kit generally includes air bags, mounting brackets, height control valves, air lines, and the hardware needed to integrate the new components with your existing frame and axle. It is designed to work with the front axle specifically, not the rear suspension.

Will this kit fit my truck without major frame modification?

Most kits designed for the Peterbilt 379 are built to match the factory frame width and axle configuration for that model, so extensive cutting is usually not required. That said, exact fitment can vary depending on your truck's model year, axle weight rating, and whether it has been previously modified. It is a good idea to confirm your axle specs and frame configuration against the kit's listed specifications before ordering, and to check with our team if you are unsure.

Do I need special tools or a professional shop to install this kit?

Installation involves removing the existing leaf spring components and mounting new brackets, air bags, and air lines, which typically requires standard hand tools along with a way to safely lift and support the front axle. Because this job affects steering and load-bearing components, many owners choose to have it installed by a qualified truck shop rather than doing it in a home garage, especially if they are not experienced with front suspension work.

How does switching to air ride up front affect ride quality and handling?

Air ride suspension is generally known for smoothing out road vibration and reducing harshness compared to leaf springs, which is why many owners upgrade for long haul comfort. Keep in mind that changing front suspension components can affect ride height, alignment, and steering feel, so it is worth planning for an alignment check after installation.

What maintenance does an air ride front axle kit need compared to leaf springs?

Air ride systems rely on air bags, air lines, and control valves that should be inspected periodically for leaks, cracking, or wear, since these are wear items that leaf springs do not have. Regular visual checks of the air lines and fittings, along with monitoring for any air pressure loss, will help you catch issues early and keep the system running as intended.