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5,000-lb Capacity. When the load gets heavy, your truck shouldn't feel like it's fighting you. These air bags help you stay level and in control so you can tow with confidence and handle heavy loads without second-guessing your suspension.
When the load gets heavy, your truck needs more than just rear springs hanging on for dear life. Alpha HD air springs add up to 5,000 lbs of rear axle support, keeping your truck steady even when the trailer is loaded, the bed is packed, and the miles are long. No more rear-end sag throwing off your braking and steering, or headlights pointing into the sky. With air bag support underneath, you keep control of your ride even when you're towing a travel trailer or moving a serious payload.
Every load is different, and this system adjusts to match. Alpha HD air springs let you fine-tune ride height and firmness with air pressure from 5 to 100 psi. When carrying heavy weight, add air to level your suspension and maintain steady handling. Running without a load? Drop to the minimum pressure for a smoother, more compliant ride without stiffness or bounce. Manual inflation valves are included, so tuning your setup for each trip is straightforward and dependable.
Air bags are only as strong as their weakest link. That's why Alpha HD bags are reinforced from end to end with heavy-duty end caps, 20 internal support wires, and powder-coated steel brackets. Add corrosion-resistant hardware and thick roll plates, and you've got gear that holds up to real-world hauling through heat, cold, salt, and slop.
Adding serious load support shouldn't mean losing a whole weekend. The precision laser-cut brackets are designed to bolt cleanly to your truck's existing mounting points with minimal drilling. Just smart engineering that fits the way it should, which is perfect for the DIYer. Manual valves mount through license plate fastener holes or a location of your choosing (which may require drilling). With high-quality fittings, pre-bent brackets, and mounting hardware included, you'll be back on the road in just a few hours without a trip to the fab shop.
This kit is designed to work with your setup today and wherever your upgrades take you tomorrow. You can inflate manually with standard air valves right out of the box, no extra parts needed. Already have an onboard compressor? The Alpha HD system connects easily to most existing setups. Planning for an in-cab wireless controller down the road? No problem. The foundation is already built in, making it easy to expand your control options when you're ready.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello, everybody. This is Jeff at etrailer.com. Today we're gonna take a look at the Pacbrake Alpha HD Airbag Suspension Kit for your rear axle. Has a 5,000 pound load leveling capacity. Now this is a custom fit part. It is designed to fit the 2013 and newer RAM ProMaster 1500, 2500, and 3500 trucks.
And it works with two wheel drive or four wheel drive models. And on a custom fit part like this, I do like to recommend for you to go to our website, use the fit guide, put in your year and model of vehicle, and it'll show if this will work for application. Now your factory suspension can struggle under real world loads. So if you're delivering cargo, towing a trailer, or building out a full van conversion, these Alpha HD air springs, they're gonna add up to 5,000 pounds of rear support, which will help keep your ProMaster level and composed when the weight adds up. So there's more dragging rear ends, sloppy cornering or headlight layer that'll blind oncoming traffic.
You'll just get a stronger stance, more predictable handling, and a peace of mind behind the wheel. It will include everything I have laid out here on the table. It includes the air springs for the rear axle. Both the upper and lower roll plates. All the precision laser cut powder coated steel mounting brackets.
Right up here, it has the grade five plated hardware. The airlines with the inflation valves. Up here, we've already installed the push to connect fittings that your airlines connect to. And it'll come with a nice set of installation instructions that all describe how this all goes together. Now, a cargo run doesn't ride the same as a weekend trip, and your suspension shouldn't reflect that.
So with air pressure adjustability from five to a hundred PSI, you could fine-tune support based on how much gear you're hauling. So basically you can drop the pressure when you're running light for a smooth ride, or pump it up when the van's packed full. The manual inflation will keep it simple, effective, and easy to manage on your own terms. And also from long haul deliveries to off grid trails, your van sees more than the perfect pavement, and the system is built for it. I'm going to zoom in a little bit onto the springs. These are one inch thick corrosion. The springs here use a one inch thick corrosion resistant end cap on each spring. And they are reinforced with 20 internal support wires to give you maximum strength under load. The roll plates we mentioned. Upper and lower roll plates. These will protect the air springs from chafing and extend the lifespan of them. And the powder coated steel brackets will fight back against rust, road salt, and rough seasons. So basically that's bitter cold, scorching heat, or mud slip trails. The system is gonna outlast whatever your road dish is out. Now this kit is designed with the do it yourselfer in mind. We mentioned the precision brackets, which will bolt to existing mounting coins with no drilling. And all components come pre-cut, ready to install. The manual inflation valves, they'll mount easily to your rear bumper or license plate bracket. And there's no complicated wiring or air tools required. Basically, it's just a straightforward upgrade that you could knock out in a few hours. And whether you're keeping it simple or planning a full onboard air system, this kit will work with your setup. You can use the manual inflation valves right out of the box, or you can even tie into an existing compressor when you're ready. Planning to add the wireless cab control later, it is compatible with that too. So basically, as your van evolves, and your suspension should be ready to grow with it. One note I do wanna mention on this, your air springs will not increase your vehicle's weight carrying capacity, so you do not wanna exceed the manufacturer's recommended weight limit. But that's gonna do it for a look at the Pacbrake Alpha HD Airbag Suspension Kit for your rear axle.
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Lazer S.
7/20/2026
Glad to hear the install wasn't too bad, Dan! Sorry to hear it stiffened up you unloaded ride though. That is one of the only downsides with adding something like this to a Ram truck. They are known for their very nice ride and once you add anything for support when towing, it does inevitably mess with it. What are you towing?