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  1. Vehicle Suspension
  2. Pacbrake
  3. Air Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Heavy Duty
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1984 Chrysler LeBaron
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Pacbrake

Pacbrake Alpha HD Air Bag Suspension Kit - Rear Axle - 5,000 lbs

Part Number: PB55ZV
In Stock
$552.06
Retail:$613.39
You Save: $61.33
Vehicle Suspension
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1984 Chrysler LeBaron

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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. Great Prices for the best vehicle suspension from Pacbrake. Pacbrake Alpha HD Air Bag Suspension Kit - Rear Axle - 5,000 lbs part number PB55ZV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (64)
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Pacbrake Vehicle Suspension - PB55ZV

  • Air Springs
  • Towing/Load Leveling
  • Rear Axle Suspension Enhancement
  • Pacbrake
  • Heavy Duty
  • Suspension Only

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.


Highlights

  • Custom Fit for Your Vehicle: Precision brackets bolt to factory attachment points.
  • 5,000-lb Load Support: Adds rear axle support for towing, hauling, and bed-loaded stability.
  • Improved Ride Stability: Reduces rear-end sag, sway, and bounce for better handling under load.
  • Adjustable Air Pressure: Set support between 5 psi and 100 psi depending on your load.
  • Complete Kit, No Drilling: Includes laser-cut brackets, push-to-connect fittings, and all hardware.
  • Ready Now, Upgrade Later: Use manual inflation or connect to an onboard air system when you're ready.

Features to know about

Control and Cushion When It Counts

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.

Dial in the Ride for Any Load

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.

Built Tough for Work and Weather

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.

Installation That Doesn't Waste Your Weekend

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.

Flexible for Today, Ready for What's Next

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.

Specs:

Weight & Capacity:

  • Load support: up to 5,000 lbs of additional leveling support
  • Air springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.

Adjustability:

  • Air pressure range: 5 psi 100 psi; maintain minimum 5 psi when unloaded

Estimated Install Time:

  • Professional install: 2 hrs
  • DIY: 3 hrs, depending on tools and experience. Plan for extra time if this is your first air spring install or you're working in a driveway setup.

Warranty:

  • Limited lifetime on air bags
  • 2-Year or 24,000 miles on mounting brackets, fasteners, and spacers

Included Components:

  • Pacbrake Alpha HD air springs (rear axle)
  • Precision laser-cut powder-coated steel brackets
  • Grade 5 plated hardware
  • Air lines, push-to-connect fittings, inflation valves, installation instructions


HP10321 Pacbrake Alpha HD Rear Air Suspension - 5,000 lbs - Manual Inflation Valves

Installation Details PB55ZV Installation instructions

This Product Fits The Following Vehicles




Video of Pacbrake Alpha HD Air Bag Suspension Kit - Rear Axle - 5,000 lbs
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Pacbrake Vehicle Suspension - Alpha HD Rear Axle Double Convoluted Air Bag Kit - PB55ZV

Hi everybody. Andy here with etrailer.com. Let's take a real quick look at this Pacbrake Alpha HD rear axle double convoluted airbag suspension kit. Now this kit has been designed to work with your 2010 to 2020 Dodge RAM 4500 and 5500 cab and chassis. Now on custom fit parts such as this kit, it is recommended that you use our vehicle fit guide here at etrailer.com. Simply enter the year make and model of your vehicle, and if it asks you any other additional questions, answer those and our fit guide will confirm if this kit will work for you or if we have something comparable that will work for you.

Now, when you're hauling equipment, towing a trailer or making deliveries with a loaded flatbed, factory leaf springs can only do so much. These air springs are going to add up to 5,000 pounds of rear axle support, giving your Dodge Ram 4500 or 5500 cab and chassis the muscle that it needs to stay level, controlled, and capable, even when you're maxed out and running long hours. With your rear end held up properly, brakings are gonna stay sharp. Steering is going to remain predictable, and your headlight aim is, your headlights are gonna aim where they're supposed to, not into the trees or up to the sky. So whether you're pulling equipment out of the yard at dawn or rolling home after dark, these airbags are gonna help your truck carry the load with confidence.

Now, as you well know, no two jobs are gonna be the same and neither is every load. That's why these air springs are gonna let you dial in the pressure from five to 100 PSI, depending on your, on what your truck's carrying. So you can fill them up when the trailer's loaded or the service body is packed to the rails and you can let some air out when you're driving as light or empty. These manual inflation valves are gonna make adjustments fast and straightforward, so your suspension's always gonna match the weight on board. What that means for you is a smoother ride for you, for the crew, and more control behind the wheel and less wear and tear on your truck no matter what the day throws your way.

But commercial trucks don't get pampered. They run in the cold, the mud, the salt, and the heat, sometimes all in on week. That's why these air springs are built with 1" thick corrosion resistant end caps. The bags themselves are reinforced with 20 internal support wires and they're protected by these heavy duty roll plates. They handle real world loads.

These also feature these really great powder coated steel brackets that are gonna stand up to rust and grime. So you're gonna be able to keep moving through the worst conditions without worrying about what's happening under the frame. And then this also is going to include all of the hardware that you need to get these secured and mounted into place. Now, I don't have all the hardware laid out here on my table. I just have the bags put together loosely with the brackets and the roll plates. So I thought it'd be better for you just to see a photo of all the hardware that's gonna be included with this kit. So you're basically gonna get everything that you need minus the tools to get this installed into place. Now, these precision laser cut brackets are designed to bolt cleanly to your truck's existing mounting points without welding or drilling to your frame. And what's great about this kit is that it's designed to work with your setup right now and wherever your upgrades may take you down the road. So again, you're gonna be able to inflate manually with the standard air valves right outta the box, no extra parts needed, but maybe you already have an onboard compressor. If so, that's great, because these are gonna connect easily to most existing setups. And then maybe you're planning for something like an in cab wireless controller down the road. That's not gonna be a problem either, because the foundation is already being laid for those future upgrades. So you're gonna be able to easily expand your options when the time comes. Now, as I mentioned, these are gonna give you up to 5,000 pounds of additional load leveling support, but be aware of the fact that these bags don't actually increase your truck's weight carrying capacity. So you do wanna make sure that you're not exceeding your manufacturer's recommended weight limit. If you do pick this kit up, we want to hear back from you regarding your experiences with getting this installed and using it. So you can share your experiences with us by dropping a comment or leaving a review on this product page. And if you happen to have any other additional questions, don't hesitate to reach back out to us. We do wanna make sure that you're getting exactly what you want and need. Well, that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.

Ratings & Reviews

4.7

64 reviews
5 Stars
(52)
4 Stars
(9)
3 Stars
(1)
2 Stars
(0)
1 Star
(2)
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by:
2007 Dodge Ram Pickup
I like these bags. This is my 3rd set of air bags but my 1st set of PACBRAKE I have owned and they are the best. Metal where others are plastic. Powder coated instead of paint that rusts off. nice hardware instead of crummy allan bolts that can't easily be removed. The bracing is much better too. They are by far higher quality than the firestone. Installation is about the same but they use stainless air fittings instead of plastic like the other guys. The ends of the PACBRAKE are machined aluminum. My Airlifts brand were plastic with inserts that broke out.(see pic) I havent had the chance to use the new PACBRAKE under tough conditions but the hardware and Materials they are made of are superior to the other brands.
by:
Installation was easy and completed in one evening. Performance is good with zero bleed off and consistent leveling with heavy trailers attached. I would recommend this product for anyone hauling heavy loads needed some additional suspension lift.
by:
2023 Toyota Tacoma
I decided on the pack break airbag due to my truck stock height. With a limited amount of room, there is between the axle and the frame they fit perfectly. They almost work with no air in them at all. I figure with a little bit of pressure. It’ll hold all the weight and still ride well I had them on the truck completely functional in an hour and a half, and that’s even with one bag, assembled incorrectly and reassembled correctly and installed so even with that little mistake it was still an hour and a half installed with the wheels off highly recommend this kit looks good. Seems to work well and fits in the tight space stock truck Cuz.
by:
Easy to install with the rear tires off, did one side at the time with a single jack and two jack stands. The towing of our fifth wheel is much better, much less chucking and more directional stable.
by:
Went in easy enough, better than I thought. Ride without trailer attached is good. Have not hooked up trailer yet
by:
2017 Northwood Arctic Fox Travel Trailer
Both of the fitting leak where they swivel. Had to take everything back off. Not my first time installing bags but First time with this brand and will be the last. Etrailer won’t make it right and having me go though pacbrake. Waiting on email to get process started. They Don’t seem to be in any hurry. Will try and source fitting local so I can get this back together. Shane on you etrailer. I ordered from you and shipping was slow not knowing it was directly coming from manufacturer.
by:
Worked well when pulling trailer. Kept vehicle and trailer level. Without trailer seems to creak and groan more than I thought it would.
by:
2010 ford F-250 Super Duty
Aluminum ends, brackets, and even packaging was all exceptional and part of the reason I choose these. Haven't trailered anything yet but upon initial install no noticeable difference ride difference running 10 psi on a F250.
by:
2018 Chevrolet Silverado 1500
Good quality product. For my 2018 1500 Silverado it was a little difficult to get the U bolt over the frame but under the hard lines running on top of the frame in that area.
by:
The air bags were very simple to install but the u bolts for my gooseneck mount interfered with the air bag mounting
by:
What a difference the air bags make when towing a camper. Installation was easy, instructions were well written.
by:
2004 Dodge Ram Pickup
Simple to install, did it without pulling the tires and wheels I seen no need for that, It took me a total of 3 hrs. to install in my driveway.
by:
These fit absolutely perfect. Easy install help keep my truck level when connected to my fifth wheel.
by:
Put about 1800 miles on these last weekend. Was picking up a car that's heavier than my normal race car on the ramp truck, so I wanted to give the truck a bit of help. Good news, it worked well. Truck rode beautifully, loaded or unloaded.

The instructions could be a bit more clear, in regards to the clinch stud. I had that on backwards at first because of how things appeared in the picture. Also, I know most things are DIY but installation was about 80% assembly, 20% actual install. If these came already assembled, it would have saved a lot of time!
by:
2021 Forest River Vengeance Rogue Armored 5W Toy Hauler
I put them to use today and was very happy with the ride and stability while towing my camper.
by:
Love the product
The directions could’v
e been a little more detailed
by:
Very well built brackets, installation was as explained in the instruction. Happy Camper!
by:
2025 Chevrolet Silverado 2500
The 2" spacers are definitely not needed for a Trail Boss. I could barely get them in, and now the ride is super stiff. Now I have to get back under the truck and remove the spacers. Not looking forward to that. It was very difficult installation, for no reason.
by:
Looks great. Thanks
by:
2025 Ford F-250 Super Duty
Easy to install and work just as I had expected. Great finish on brackets and quality hardware. Easy to follow instructions. Highly recommend these airbags!
by:
The product is a great product. After installation was completed and the air added to the air suspension, it raised the rear end of the van about 2-3 inches.A very nice improvement.
Installation instructions definitely need better quality diagrams.
by:
nick was very helpful everything was as expected
by:
Easy instal and has worked perfectly.
by:
2025 Chevrolet Silverado 1500
Great kit. Great quality. Easy assembly. Would’ve given 5 stars except for the J-Hooks. Having the end user cut them off creates an opportunity for someone to mess up. They could easily be made the correct length without causing install issues.
by:
Overall the installation isn’t bad, couple bolts/nuts difficult to access but doable. Took little over an hour to install both heavy duty bags.
They do roughen the ride on the 2021 RAM 1500 hemi/etorque 4x4 with coil springs. I’ve brought the air pressure down to 2 lbs and still notice that without weight in bed or trailer attached it still is stiffer.
I would recommend using these Pacbrake heavy duty air bags.
Lazer S. profile picture
Etrailer Expert

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?

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Info for this part was:

Employee Dustin K
Video Edited:
Dustin K
Employee Daron K
Edited by:
Daron K
Employee Andy C
Installed by:
Andy C
Employee Dawn Z
Written by:
Dawn Z

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