Pacbrake Alpha HD Pro Air Bag Suspension Kit w/ Internal Jounces - Rear Axle - 5,000 lbs
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1979 Jeep Cherokee
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1979 Jeep Cherokee
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Heavy trailer, camper, or bed loads can leave your truck squatting and less controlled. These air springs add up to 5,000 lbs of leveling support to reduce sag, sway, and bottoming, while internal jounces let you run 0 psi unloaded.
When trailer weight, a slide-in camper, or a heavy bed load settles your truck onto its rear suspension, squat and extra body movement can make the truck feel less controlled. The two adjustable rear air springs add supplemental support to help reduce sag, sway, and bottoming while letting you tune the suspension to the weight you're carrying. With up to 5,000 lbs of load-leveling capacity, you can add only the pressure the load calls for instead of treating maximum pressure as the default. Your truck can sit closer to level and remain more controlled while carrying or towing substantial weight.
A truck that tows one day and runs empty the next doesn't need the same rear-suspension support all the time. Internal jounce bumpers let you add air when your trailer, camper, or cargo is aboard, then reduce the air springs to 0 psi once that load comes off. Those internal jounces also protect the air springs against bottoming when suspension travel is used up. You get the support your truck needs under weight without having to keep air in the bags simply to protect them when you're driving empty.
Suspension hardware lives where road spray, dirt, and weather reach it, so material choices matter underneath your truck. This kit uses braided stainless steel air lines along with stainless steel fittings, Schrader valves, roll plates, and mounting hardware to add corrosion resistance throughout key parts of the system. That extra durability is focused where it matters, helping the hardware you rely on for load support and pressure adjustment stand up to the environment beneath a working truck.
You'll start by measuring your truck's stock ride height and checking tire-to-frame clearance before removing the factory jounce bumpers, with rear-wheel removal optional if you want more working room. The air spring assemblies mount between the frame and axle using the existing jounce-bumper mounting locations up top and axle straps below, with careful alignment and brake-line clearance checked before everything is torqued down. Once the springs are secured, you'll install the passenger-side exhaust heat shield, then route the braided stainless steel air lines with enough clearance and slack for suspension movement before mounting the Schrader valves where they're easy to reach. Adding air bags is a job experienced DIYers can handle, but if you would rather leave it to a professional, we can help you find an installer near you.
The included Schrader valves give you everything you need to adjust the air springs manually, but pulling out an external compressor can get old if your towing or hauling setup changes frequently. You can add a Pacbrake Bravo Wireless Air Control Kit (sold separately) to adjust pressure from your phone, check live pressure, and save presets for loads you come back to regularly. Also, you'll be able to choose between filling both air springs together or controlling them independently when the load isn't even side to side. It's an optional upgrade, but one that makes the adjustable part of an air-spring system much easier to use regularly. And it's not the only solution available. There are a variety of compressor options from Pacbrake that might be the perfect fit for your setup.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer. Let's take a quick look together at this Pacbrake Alpha HD Pro Rear Axle Airbag Suspension Kit with Internal Jounce Bumpers and Stainless Steel Hardware. Now this has been designed to fit your 2014 to current RAM 500, both the two-wheel and four-wheel drive models and on custom fit parts such as this kit, I do recommend taking advantage of our Vehicle Fit Guide here at etrailer. Just pop in the year, make and model of your vehicle and answer any other questions that it might have for you. And our Fit Guide will confirm if this set will work for you or if we have something comparable that will work for you.
So when the load gets heavy, your truck is gonna need more than just your factory rear springs hanging on for dear life. These airbags are gonna give you up to 5,000 pounds of rear axle support. It's gonna help keep your truck level and steady even when your trailer is loaded, the bed is packed and the miles are long. So what that means for you is no more rear end sag throwing off your braking or steering or your headlights pointing up into the sky. Now bottoming out just doesn't feel rough.
It can actually wreck your airbags. That's why this system includes jounce bumpers inside of each bag. As you can see on that example that I have there for you on your screen, so even with no air pressure, your suspension has a built-in safety net. You're gonna be able to safely run at zero PSI when unloaded, which means no harsh rebound, just a smooth factory style ride. Now this does include these stainless steel braided airlines, which are gonna be more durable and resistant to wear compared to standard rubber lines.
You're also gonna get these stainless steel roll plates, which are gonna help protect the airbags along with Schrader valve. So you can easily inflate or adjust the air pressure with using a standard air source. Now on your screen, I wanna pop up a picture there. You're gonna get this hardware here that you see there on your screen. The top picture is just the standard hardware that typically comes with these airbags, and then you see the brackets laid out there as well.
I kind of have them roughly put together here on my table just to show you how things are gonna be put together. But the bottom photo is the stainless steel hardware upgrade kit that is included with this as well. So I did not have the room on my tabletop to lay all the hardware out, so I just wanted to show you what you we inchesre gonna be getting. You're not gonna use all of that hardware, but again, I just wanted you to be aware of what's gonna be included altogether in this kit. But that stainless steel is gonna be a big upgrade because it's built to last in harsh conditions. As you know, stainless steel resists rust and corrosion much better than the standard materials. It's also stronger and less prone to damage, so you're gonna be less likely to deal with leaks and wear over time. Now these air springs are gonna give you full control over your ride height and firmness with adjustable air pressure from five to 100 PSI. So for example, if you're hauling a 5th wheel or a full bed of gravel, you can crank that air pressure up. If you're unloaded and heading home, you can drop it back down for a softer ride. These springs are built with one-inch thick corrosion-resistant end caps and reinforced with 20 internal support wires giving you maximum strength under that heavy load. And then these also include these powder coated, laser cut steel brackets that are going to mount right to the frame of your vehicle. No welding, no drilling. Again, they're custom fit. Everything is premium about Pacbrake kits from the air springs to the materials used on the hardware. It's one of my favorite air spring kits that we carry here at etrailer. Now again, the load support is gonna be up to 5,000 pounds, but just be aware that air springs don't actually increase your weight carrying capacity. So you wanna make sure that you're not exceeding your truck's manufacturer's recommended weight limit. If you want help with installation, we do have you covered. On this product page, underneath the Photo section, we have a link that will take you to our Installer Locator. Click that link, answer the questions that it has for you, and that locator will find an installer that etrailer has partnered with to do the install for you. That installer of course will be in your area, but if you happen to have any other questions about this or anything else that we have here at etrailer, don't hesitate to reach out. We wanna make sure that you're getting exactly what you need. Well, again, my name's Andy. Thank you for joining me.
Ratings & Reviews
Did not fit my truck 2026 Silverado 1500 4x4, website said it would fit, it does not fit, as axle plate is Square on my truck, this kit have round axle plate that interferes with spring shackle bolts, would not fit or even be centered. SO I am returning them, this needs to be corrected on your website, it does not fit the 2026 Silverado 1500 2x2 or 4x4!
Great product!
Parts fit perfectly, directions were very easy to understand.
I have no problems with the quality or the install. My one problem is the instructions, when you order the stainless steel kit, it comes with a separate box to replace the hardware. That's totally fine, but it would be nice if they could work that in the instructions for when to install the stainless steel airlines because you can install them at the same time that you can the push in plastic lines. Besides that, these are an insane set of airbags. When I ride at zero psi cuz I got the ones with the internal jounce bumpers, I did not expect this but it smooths out my ride. That's a super huge plus.
The only reason I bought this kit is because I was told I could put zero psi when not towing and I would not lose the factory suspension comfort. That information was wrong its a horrible ride now and I regret getting these bags. Was also told that they don't off this kit without the stainless upgrade so I had to buy it, but when it shipped there was a separate box with the stainless kit and they regular stuff was in the same box as the bags feels like I got ripped off on this deal
This is a very nice kit. I installed on my new 2026 Silverado 2500hd. Installation was pretty straight forward, but still took a bit of thinking. After everything is mounted correctly there is a slight lean to the bags (not completely perpenticular to the mounting plates). I called Pacbrake support and they assured me this was normal and nothing to be concerned with. I had the equivalent AirLift kit on my 2007 Silverado 2500hd and I think I like the Pacbrake kit better. Everything seems a bet "beefier".
It was easy to order and the stuff I ordered is just what I was looking for. The people who helped me was great
Great set up. Easy to install. Much better than the Timbren bump stops.
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