Peterbilt 357/378 Front Axle Air Ride Kits

Frequently Asked Questions About Peterbilt 357/378 Front Axle Air Ride Kits

What does a front axle air ride kit actually replace on my Peterbilt 357 or 378?

These kits convert your truck's front suspension from a traditional leaf spring or existing setup to an air-ride system, using air springs, brackets, and related hardware in place of or alongside factory components. The goal is to smooth out ride quality by letting the front end absorb road impact through air rather than solid spring flex.

Will this kit fit my specific truck, or do I need to check other details besides the model?

Fitment depends on more than just knowing you have a 357 or 378. Front axle weight rating, axle width, existing suspension type, and frame configuration can all vary by build year and spec, so it's important to confirm those details against the kit's listed specifications before ordering. If you're unsure, having your VIN or axle tag information on hand makes it easier to verify compatibility.

Can I install a front axle air ride kit myself, or should I have a shop do it?

Some experienced DIYers with the right tools and a lift do tackle these installs, but this job involves suspension components tied directly to steering and axle alignment, so precision matters. Most customers have a qualified truck shop handle the install to make sure ride height, alignment, and air line routing are done correctly the first time.

How does an air ride front end affect ride quality and handling compared to leaf springs?

Air suspension generally provides a smoother, more consistent ride by adapting to load and road conditions better than a fixed leaf spring setup. Many drivers notice reduced cab vibration and less harshness over rough pavement, though actual results depend on the specific kit, air pressure settings, and how the system is tuned after installation.

What maintenance should I expect after switching to an air ride front axle setup?

Air ride systems introduce components like air springs, air lines, and fittings that need periodic inspection for leaks, wear, or damage. Regularly checking air pressure, looking for cracked or chafed lines, and inspecting mounting hardware for looseness will help the system perform reliably over time.