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  1. Vehicle Suspension
  2. Air Lift
  3. Air Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Heavy Duty
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2005 Lincoln Aviator
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Air Lift

Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle

Part Number: AL88391
$724.99
Retail:$1,000.99
You Save: $276.00
Vehicle Suspension
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2005 Lincoln Aviator

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
5,000-lb Capacity. LoadLifter 5000 Ultimate air springs have internal bumpers, so you get the adjustable load support of air springs and the comfort and reliability of jounce springs. Jounces also work as a fail-safe if air springs lose pressure. Great Prices for the best vehicle suspension from Air Lift. Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle part number AL88391 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Air Lift Vehicle Suspension - AL88391

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 5,000-lb Load Support: Levels your truck to reduce squat and keep handling steady under load.
  • Built-In Jounce Springs: Keep control and comfort even if air pressure drops or roads get rough.
  • Adjustable 5–100 psi Pressure: Fine-tunes ride firmness for towing, hauling, or daily driving.
  • Better Ride Stability: Cuts sway and bounce so steering and braking stay predictable when loaded.
  • Durable 2-Ply Air Bags: Reinforced rubber with roll plates and nylon caps stand up to heavy use.
Made in USA

Features to know about

Stay Level and Confident Under Load: Up to 5,000 lbs of Rear Suspension Support

Heavy trailers and loaded beds can make the rear of your truck sag, throwing off braking and steering. The LoadLifter 5000 Ultimate air helper springs add up to 5,000 lbs of load-leveling capacity to keep your vehicle level and stable. They pair with your existing suspension to distribute weight evenly and help maintain safe headlight aim. With air pressure adjustable from 5 psi to 100 psi, you can fine-tune support for towing or hauling without overstressing your factory suspension.

Air Lift LoadLifter 5000 Ultimate air spring with black roll plates for heavy-duty rear suspension load leveling and protection.

Ride Comfort That Adapts to the Road: Built-In Urethane Jounce Springs

Rough roads and changing loads can make any suspension bounce or bottom out. Inside each LoadLifter air spring is a closed-cell urethane jounce spring that absorbs bumps and adds stability when your air pressure is low. These jounces engage progressively—the more you load them, the stiffer they become—so you get a smoother ride with less sway and better cornering control. They also act as a fail-safe, temporarily supporting your suspension if pressure is lost.

Close-up of Air Lift LoadLifter 5000 Ultimate air spring showing internal urethane jounce bumper for vehicle suspension support and comfort.

Built Tough for Long Life: Heavy-Duty Rubber and Corrosion-Proof Components

Air springs only work as long as they hold air, so durability matters. Each LoadLifter 5000 Ultimate uses 2-ply, fabric-reinforced rubber with exclusive upper and lower roll plates that protect against damage and extend life. High-strength Zytel nylon endcaps are lighter, stronger, and more corrosion resistant than steel, keeping the system leak-free through years of use in any weather.

Easy to Install and Adjust: Complete Kit with Manual Inflation Valves

Setting up your air springs doesn’t require a shop visit. The LoadLifter 5000 Ultimate includes mounting brackets, hardware, air lines, and manual inflation valves so you can get up and running with basic tools. The valves can be mounted on the bumper for quick access and individual adjustment side to side for uneven loads. If you want more control from the driver’s seat, a compressor system with in-cab gauges or wireless control can be added later.

Specs

Weight and Capacity

  • Load-leveling capacity: up to 5,000 lbs

Pressure Range

  • Adjustable air pressure: 5 psi - 100 psi

Warranty

  • Lifetime warranty
  • 60-Day satisfaction guarantee

Note

  • Service caution: When servicing your truck with Air Lift air springs installed, if the truck is lifted by the frame, the air must be let out of the springs. And if the rear of the truck is lifted during service, then it must be supported by jack stands to avoid damage to the air springs.

88391 AirLift Load Lifter 5000 Ultimate Air Bags with Internal Jounce Bumpers - Back Axle

Installation Details AL88391 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

1528 reviews
5 Stars
(1258)
4 Stars
(171)
3 Stars
(32)
2 Stars
(20)
1 Star
(47)
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5,000-lb Capacity. LoadLifter 5000 Ultimate air springs have internal bumpers, so you get the adjustable load support of air springs and the comfort and reliability of jounce springs. Jounces also work as a fail-safe if air springs lose pressure.

by:

This was a great upgrade for my 2025 Silverado 1500. The install was straightforward the wiring bracket on axle was kind of a pain but described well in instructions how to address it. Can’t wait to use it when I hook up the trailer this summer. Thank you



by:

The airbag kit had all the parts in the box and a few exta washers and nuts (yes) because I lost one somewhere in the process of installing. The instructions were easy enough to follow though the part numbers on part bags didn’t match the part numbers on part list in instruction manual but I figured it out. The quality seems to be top notched. These airbags are great fit on my 2009 Silverado 2500HD Diesel towing a 35 foot 2018 Jayco Fifth Wheel.



by:

I purchased a set of these airbags for my old truck from etrailer and ran them for 17 years pulling a 42’ fifth wheel without any problems. So there was no hesitation for me to order the same for my new truck. I looked up everything I needed up on the etrailers site and called Josh at etrailer and he verified what I needed and got it on order. Also he verified my onboard compressor would work with the new air bags. Everything was received in a few days as usual. The airbags came with very good instructions and were no trouble to install and installation went quickly and have been preforming great. etrailer is always my go too for my truck and camper parts, also the bonus is if you have any problems or questions you can call etrailer and talk to a real person and get any problems corrected. etrailer for the win.



by:

just installed loadlifter 5000 in driveway was easy enough with help of video and instructions. Only drawback was losing a clip inside the truck frame. Maybe including some extra hardware would be nice for us non mechanics. Would have given 5 star but have not hooked my trailer up to truck yet



by:

I'm really happy with my purchase and am glad I purchased it here. Customer care was knowledgable, helpful, quick and friendly. Shipping was super fast. I couldn't be happier!



by:

Some quick feedback that we have had the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle kit installed on our 2024 Ford F250 Super Duty pick up a few weeks ago. Everything went well with the install by Valley Truck & Trailer in Castro Valley, CA. The team there did a great job at a fair and agreed upon price up front. Final cost was exactly as quoted. Not able to test out the air helper springs under load until we hitched up our fifth wheel. Over the past week we hooked up for a quick trip and WOW what a difference! We are very happy with the ease and speed to "pump up" to desired 60 psi with only a hand "bicycle" pump. The picture attached shows a before and after shot of our rig with and without the air helper springs installed. The difference is night and day. Most importantly I feel much safer and more stable and in control on the road with the truck being level vs. having front end higher than back end. I tried to add a review online at etrailer.com but the fields were locked and I was not able to add any pictures.

I don't usually go so far out of my way to review a product but in this case it is fully warranted. Thanks so much.



by:

These airbags definitely give me a much better ride due to Toyota using coil springs in the rear. I would have given them 5 starts but one of the airbags inset thread was damaged and I was lucky enough to have the right tap. It wasn't noticed till I had my truck on the lift and the first bag installed. If i wasn't able to do that I would have had to uninstall the first bag and wait for a replacement. I understand these things happen but check your parts thoroughly before installing. I would purchase these bags again if needed.



by:

This product was fairly easy to install. The biggest problem I faced was a suspension bracket on my passenger side next to wear I installed that airbag. It was not mentioned in the video instructions. I really struggled getting my tools and hands on such a tight spot. After an hour, everything was ready to roll.



by:

Installed on a 2024 GMC Sierra Crew SLT with rear poly mono springs. This worked great and the install was easy. It took me about 2.5 hours on a 4 post lift, but you could do it in the driveway if you needed to. I reached out to airlift to make sure it would work on a vehicle with mono-springs and they were not 100 percent sure if it would. So I took a chance and it worked flawlessly!



by:

2021 Ram 2500 install was easy, it took a while to run the airlines. I pull a 5th wheel camper 700 miles each trip, the air bags eliminated the side by side roll and keeps the bed level. So far I am very satisfied with the results. When I am not pulling a trailer I lower the air bags to 10lbs for a better ride.



by:

I explained the size/weight of the load I carry in my duallie. A 5000lb slide in camper and a 28' twin engine jet boat. These bags are probably great for their respective load, but I was convinced by the sales team at etrailer that these would be sufficient. They aren't. I can put 100lbs of air (the max) in and truck still sags. Should have gone with the 7500 lb bags.



by:

works very well. i installed them on a 2012 Ford F-150 towing a Grand Design 2600 RB. the airbags substantially helped cut down the bouncing when going over big bumps, bridge decks, etc. also helps with the side winds. very happy with set up.



by:

etrailer delivered these in four days which was a pleasant surprise. The Load Lifter 5000 were easy to install and all of the parts fit perfectly. The installation instructions were spot on as well. I tried to save a little time by leaving the wheels mounted, that turned out to be a mistake, so I removed the wheels mounted on the second side and saved about 45 minutes. The loadlifters perform exactly how I want. They took all of the sway out of my tundra while hauling my truck camper.



by:

Deliver was awesome, installation was a little more complicated than expected but had installed big wig sway bar and torklift lower wedges added some unexpected fitment modifications but I can say has delivered results I wanted.



by:

The truck rides much better now, though I haven’t yet towed with the air bags yet. The bags took out that annoying side to side movement.
Just great!
Easy to install.



by:

The AirLift 5000 work great. The installation brackets didn't work for my Toyota RV & I had to fabricate the ones that'd mount to the frame. Otherwise, awesome improvement to the stability & ride.



by:

Great instructions and easy installation! Fit perfectly! Loaded my tractor to test them out and they completely leveled my sagging truck with 42psi.



by:

Good system seems to made very well. I also got the Airlift Compressor as well Would have done 5 stars but the quick mount doesn't fit a 2025 F250 frame. About an inch to small. DIRECTIONS are terrible, pictures are blurry. Had to you tube the install. for that much money a couple of more pages explaining better with clear pictures.



by:

Works amazing. The install was a little more difficult than it appears… It actually took me and a couple other guys five hours to get it completely installed.
There was a lot of cutting/grinding metal to make pieces fit properly, and had to drop the axel completely… I think that’s only for my gen 2 raptor.
At the end of the day, though I’m very happy with the result



by:

Just had them installed, I’ll be hauling a 9800lb travel trailer soon. That will be the real test!
Added 40lbs of air, they sit the rear of truck up nicely.



by:

I was easy to install just a few hours. Everything in the kit fit well. It would be nice if an extension brackets were provided for the brake line/abs wire mounting bars would be included like the brake line adapters that’s provided in the kit is my only recommendation to make it top notch.



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See what our Experts say about this Air Lift Vehicle Suspension

  • What Air Lift LoadLifter 5000 Ultimate Kit Fits a 2024 Ford F-250?
    Hi William, If you're wanting the Air Lift 5000 Ultimate for your 2024 Ford F-250, you'll need the Air Lift LoadLifter 5000 Ulitmate Air Helper Springs part # AL29DQ if you have 4WD. Or if your truck is 2WD, you'll need the Air Lift LoadLifter 5000 Ultimate Air Helper Springs part # AL88391. The Air Lift LoadLifter 5000 Ultimate kits have air bags rated for 5,000lbs load capacity and have an internal jounce bumper, so if the bag were ever to lose pressure while hauling it'll keep you...
    view full answer...
  • Air Lift Air Bags Options For A 2026 Ford F-350 Dually
    Hi William! We do call out if a kit will fit a dually or not, we just do it a little differently than Air Lift does (see included image). That said, the Air Lift LoadLifter 7500 XL Ultimate Air Helper Springs - Rear Axle # AL89DQ you asked your question from is not going to fit your 2026 F-350 Dually, but we definitely have options that will. For that, check out the following two parts: Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle # AL73DQ Air Lift LoadLifter 7500 XL Ultimate...
    view full answer...
  • What Complete Air Bags Can I Control from the Cab of My 2021 Ford F-350 Super Duty with In-Bed Hitch
    Since you are transporting a fifth-wheel trailer, I assume you are looking for rear-axle air bags. We only carry Firestone-brand Ride Rite air bags that will work with 4-wheel drive models of 2021 Ford F-350 Super Duties with an in-bed hitch. That is the Firestone Rebel # F95FV. Apart from the 7,500-pound load-leveling weight capacity, the springs help prevent sagging while towing. They are also 100% made in the U.S.A. As far as compatibility, these air bags work with a fifth-wheel hitch...
    view full answer...
  • Best Rear Suspension Enhancement For 2022 Ford F-350 2WD Dually With Uneven Sag From Slide In Camper
    With you slide in truck camper causing the passenger side of your 2022 Ford F-350 Dually 2WD to sag more than the drivers side, the Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88391 are going to be the best option for you. The air bag helper springs will allow you to use different air pressures in each bag to give you the most level ride possible. The Air Lift WirelessAIR Compressor System # AL74000EZ will allow you to adjust the air pressure to each spring from either the...
    view full answer...
    Image 1 for
  • Air Lift Air Bag Helper Springs Compatibility With SuperSprings On a 2022 Ford F-250 With Camper
    Yes, you will be able to install one of the Air Lift LoadLifter 5000 kits with the SuperSprings Custom Suspension Stabilizer # SSA25 on your 2022 Ford F-250. A 4 wheel drive truck will use the Kit # AL35FJ while a 2 wheel drive will use Kit # AL88391. The Air Lift WirelessAIR Compressor System # AL74000EZ will allow you to easily control the air pressure in each air bag from either the included wireless remote or your smartphone using the Air Lift app. This compressor has a smart manifold...
    view full answer...
  • Recommended Airbags For A 2020 Ford F-250 Super Duty With Factory Prep Package
    For your 2020 Ford F-250 Super Duty with OEM Prep Package I recommend the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers # AL88391 if you have a 2 Wheel Drive model and the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers # AL35FJ if you have a 4 Wheel Drive model. Note: The # AL35FJ will not fit TREMOR models. These airbags will install under the frame so there's no interference with your factory puck system unlike...
    view full answer...
  • Air Lift Airbags and Compressor Kit Compatible with a 2018 Ford F-350
    Hello Tom. I called my contact at Air Lift and was able to confirm fitment of the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers for your 2018 Ford F-350. If you have the two wheel drive (2WD) version then you will want to use part # AL88391 but if you have the four wheel drive (4WD) version then you will want to use part # AL88399. Both of the above systems will work well with the Air Lift WirelessONE Compressor System for Air Helper Springs - Remote...
    view full answer...
  • What is Difference Between Air Lift Load Lifters AL88391 and AL88399 for 2018 Ford F-250
    Since you have a 2 wheel drive version of the 2018 Ford F-250 the correct Air Lift LoadLifter 5000 is the part # AL88391 as the part # AL88399 is for the 4 wheel drive versions. Both of these are compatible with in-bed hitches like your Turnoverball as well.
    view full answer...
  • Best Air Bags For 2018 Ford F-250 2WD Towing 5th Wheel Trailer
    If you are having some squat issues even with the Timbrens then upgrading to air bags is a good idea as they will allow you to set the best air pressure for your situation to help with the squat you have. The best option for air bags that fit your 2018 Ford F-250 2WD and are compatible with your set up are from Air Lift: - Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88391 These Air Lift air bags are designed for heavier-duty applications and their 5,000 lb capacity is the...
    view full answer...
  • Air Suspension and Wireless Controlled Compressor Recommendation for 2020 Ford F-250
    I'd recommend the # AL88391 from Air Lift. Their LoadLifter 5000 Ultimate provides built-in jounce bumpers that help prevent body roll, and also provide support for the bags themselves should a leak develop somewhere in the system. The bumpers prevent the bags from being damaged when they're ran empty as they prevent the bag from fully collapsing. For a compressor system with a wireless remote, I'd highly recommend the # AL74000EZ Wireless AIR Compressor System, which can use the included...
    view full answer...
  • AirLift LoadLifter 5000 Rear Axle Air Bag Kits for 2017 Ford F-350
    The AirLift LoadLifter 5000 air spring kits that fit the 2016 Ford F-250 are parts # AL88396, and # AL57396 for 4WD versions and parts # AL88395 and # AL57395 for 2WD. All are shown on one of the linked pages. The other linked page shows the AirLIft kits that fit the 2017 F-350. None of these is a common fit between the two trucks. Some of the kits for the F-350 are combination springs - they are both jounce springs and air springs in one - such as kits # AL88399 (4WD) and # AL88391 (2WD)....
    view full answer...
  • What are the Highest Load-Leveling Capacity Rear Air Bags for My 2022 Ford F-250 2x4?
    For the highest capacity rear air bags for your 2022 Ford F-250 Super Duty 2-wheel drive, we have two options: the Air Lift LoadLifter 5000 # AL57391 and the LoadLifter 5000 Ultimate # AL88391. Both of these systems offer your vehicle 5,000 pounds of load-leveling capacity, which is the highest capacity we have. Both of these models are compatible with your 2-wheel drive. The difference between these two systems is that the Ultimate version has an upgraded black-powder coated roll plates...
    view full answer...
  • Recommended Air Helper Spring Kit For 2018 Ford F-250 Towing 35' Trailer
    I would be happy to recommend an air helper spring kit for your 2018 Ford F-250 with the 6.2L engine. If your F-250 is a 4WD model I highly recommend the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers # AL88399 which offer 5000lbs of load leveling capacity and have an internal jounce bumper that will support the load if there is ever a failure with the bag. If you have a 2WD model instead you would need the # AL88391 instead. Both of these kits will...
    view full answer...
  • Air Helper Spring Suspension Recommendation for 2017 Ford F250 2WD
    The primary purpose of the internal jounce bumpers of the Air Lift # AL88391 LoadLifter Ultimate Air helper springs is to provide a failsafe if the system develops a leak and you lose pressure while you're towing or hauling. This is pretty important, because the factory jounce bumpers are removed to install the air helper springs. If under a heavy load, and the system loses pressure it's possible that the suspension could bottom out which is harmful for the air bags as well as the vehicle. The...
    view full answer...
  • Can I Use Airbag on a 2020 Ford F-250 2WD with the Factory Prep Package
    The only airbag kit we have that will fit your 2020 Ford F-250 is the Air Lift LoadLifter 5000 Air Helper Springs part # AL57391 for standard or part # AL88391 for ultimate. The ultimate version has an internal jounce spring which lets you temporarily carry a load with zero air pressure in your springs. The Firestone Ride-Rite Air Helper Springs part # F95FV will not work for you because the airbag installs on the outside of the frame rail which is currently occupied by the factory prep...
    view full answer...
  • Recommended Air Bag Kit for a 2018 Ford F-350 Dually with B&W Gooseneck Hitch Installed
    Since the B&W Gooseneck Hitch # BWGNRK1116 on your 2018 Ford F-350 installs on the sides of your frame the Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88391 is what I recommend going with. These install between your axle and the bottom of your frame so it is compatible with your B&W hitch and will not prohibit the use of the lever for the hitch ball. This kit is rated for up to 5,000 lbs and features internal jounce bumpers for extra support. The air compressor kit that I...
    view full answer...
  • Recommended Air Lift Kit for a 2 Wheel Drive 2022 Ford F-250 With the Towing Prep Package
    For your 2 wheel drive 2022 Ford F-250 with the factory prep package, you will need the Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle # AL88391. There will be no drilling required for the installation and this system is compatible with in bed hitches. These have a load-leveling capacity of up to 5,000 pounds at 100 psi, but can then also be aired down to 5 psi, getting you back to as close to your stock ride as possible. A potential add-on...
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Mike L
Expert Research:
Mike L
Employee Joshua S
Video by:
Joshua S
Employee Daniel D
Video by:
Daniel D
Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Brent H
Installed by:
Brent H
Employee David F
Installed by:
David F
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Alex H
Updated by:
Alex H
Employee Noah M
Updated by:
Noah M
Employee Bradley B
Test Fit:
Bradley B

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