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  1. Vehicle Suspension
  2. Pacbrake
  3. Air Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Heavy Duty
THIS ITEM IS NOT A FIT FOR
1987 Toyota Micro Mini Motorhome Chassis
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Pacbrake

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

Part Number: PB57YJ
In Stock
$384.99
Retail:$427.77
You Save: $42.78
Vehicle Suspension
Not Confirmed to Fit

1987 Toyota Micro Mini Motorhome Chassis

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
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 PB57YJ 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 - PB57YJ

  • 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: 3 hrs
  • DIY: 4 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


HP10684 Pacbrake Alpha HD Rear Air Suspension - 5,000 lbs - Manual Inflation Valves

Installation Details PB57YJ 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 Air Bag Suspension Kit - PB57YJ

Hi, everybody, Andy here with etrailer. Let's take a quick look together at this Pacbrake Alpha HD Rear Axle Air Bag Suspension Kit. Now this has been designed to fit your 1996 Chevrolet GM30 van and GMCG3500 van, and then your 1996 to current Chevrolet Express van and GMC Savannah Van, 2500 and 3500 models. Now on custom fit parts such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer. Pop in the year, make, and model of your vehicle, answer any other questions that it might have for you, 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, a couple of other things I wanna mention regarding fitment.

These are gonna be for your cargo and passenger vans only. They are for vehicles that are over 7,300 pounds gross vehicle weight rating. And these will not fit the cutaway chassis models, just so you're aware of that upfront as well. So this Pacbrake Alpha HD Air Spring Kit is designed specifically for your vehicle as we mentioned, so installation's gonna be straightforward and secure. These heavy-duty laser cut brackets are gonna bolt directly to existing factory-mounting points, which means there's no drilling required.

And the main purpose of these air springs is to provide up to 5,000 pounds of load-leveling support to your rear suspension. So if you tow a trailer, if you carry heavy cargo or you're frequently hauling heavy equipment, these air springs are going to help keep your vehicle sitting level by reducing rear-end sag. They're also going to improve overall ride quality by minimizing sway, bounce, and body roll, giving you more stability and control when you're under that heavy load. One of the biggest advantages is adjustability. You're gonna be able to set the air pressure anywhere from five to 100 PSI, depending on how much weight you're carrying, and then you're gonna be able to run lower when you're unloaded for a more comfortable ride and then increase the pressure when towing or hauling to maintain proper ride height and handling.

Out of the box, you're gonna be able to inflate the air springs manually using the included Schrader valves. If you'd like more convenience later, though, this system is fully compatible with onboard air compressor kits. That's going to allow you to adjust pressure from inside your vehicle without replacing the air springs. Now I didn't have room on my tabletop to show you everything that's gonna come in your kit. I did kind of loosely assemble these just to kinda give you an idea of what this is going to look like when it's mounted on your vehicle.

But this comes, as you can see there, with everything that you need for installation. You're gonna get the springs, you're gonna get the precision laser cut powder coat, steel brackets, grade 5-plated hardware, air lines, push connect fittings, inflation valves, and so everything that you see there as it's laid out, also instructions to guide you through the installation process. One important note to make is that these Air Springs help support and level your load up to 5,000 pounds, but they do not actually increase your vans weight, factory weight carrying or towing capacity. So you always wanna make sure that you're staying within the manufacturer's recommended weight limit. Another thing I wanna mention is if you do want help with installation, we do have you covered. On this product page typically 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 in your area to install this kit for you. Well, again, my name's 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:
2003 Chevrolet Express Van
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.
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See what our Experts say about this Pacbrake Vehicle Suspension


Info for this part was:

Employee Katherine B
Edited by:
Katherine B
Employee Andy C
Installed by:
Andy C
Employee Dawn Z
Written by:
Dawn Z

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