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The LoadLifter 7500 XL Ultimate offers greater leveling strength for towing and hauling with 7-inch double-bellows air springs and up to 7,500 lbs. load-leveling capacity. The fully adjustable kit helps support the most significant loads.
The LoadLifter 7500 XL Ultimate offers support for the heaviest tows with an internal jounce bumper, absorbing shock for the smoothest ride. Air Lift’s fully adjustable, industry-leading air springs are the perfect upgrade for your vehicle, eliminating any issues you might face when towing and hauling. With Air Lift’s LoadLifter 7500 XL Ultimate and the added stability that air springs provide, you can haul safely, knowing that you have optimal braking and steering control. The kit offers up to 7,500 lbs. load-leveling capacity while eliminating squat, trailer sway, body roll and bottoming out for select Ford F-250, F-350, four-wheel drive, and select Ford F-450 non-commercial chassis, four-wheel drive. The LoadLifter 7500 XL Ultimate kit is set apart by a pair of massive 7-inch, double-convoluted bellows air springs. The larger air springs allow for better leveling abilities at lower air pressures than similar systems, keeping your cargo safe and secure while ensuring a more comfortable ride. The closed-cell urethane foam jounce bumper inside the air spring provides a cushion of air that absorbs shock, eliminates harsh jarring on rough roads, and protects vehicles carrying heavy loads. All end caps are made with an ultra-high-strength nylon composite formula, strong as steel but much lighter and corrosion-proof. The air springs are built like tires, reinforced with 2-ply fabric for maximum strength. With the added stability that air springs provide, you can haul safely, knowing that you have optimal braking and steering control. The LoadLifter 7500 XL Ultimate has up to 20% more air spring volume when compared to Air Lift’s LoadLifter 5000 series. The LoadLifter 7500 XL Ultimate’s air springs are maintenance-free, can run safely on zero air pressure, and are fully adjustable from 5-100 PSI for precise control. Do not exceed the vehicle's gross vehicle weight rating (GVWR).
Air Lift Company has developed dependable air spring suspension products since our inception in 1949. Our original product, a rubber air spring inserted into a car’s factory coil spring, was created and patented in 1950. We’ve come a long way since 1949 and are proud to be a dedicated suspension specialist company.
Today, Air Lift load support products are sold worldwide and are engineered to fit over 540 vehicles. Our extensive product line offers air helper springs for trucks, RVs, SUVs, CUVs, and vans, as well as the most technologically advanced on-board air compressor systems for on-the-go air spring control.
Air Lift leads the industry in no-drill applications – kits that bolt onto your vehicle’s frame, speeding the installation process. Our teams work constantly to bring innovative products to you and upgrade existing products with the latest technology.
All of our efforts are spent ensuring your safety and comfort by designing, engineering, and manufacturing the highest quality suspension products. We are a family-owned business based in Lansing, Michigan, and make your family and cargo’s safety our top priority.
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The Air Lift LoadLifter 7500 XL Ultimate provides supreme support for heavy hauling 57577 (Part #BBCG57577) fits 2017-2019 Ford F-250 Super Duty models. The 2022 model year is the last year covered by this part number. For newer models, check for an updated version.
The Air Lift LoadLifter 7500 XL Ultimate provides supreme support for heavy hauling 57577 (Part #BBCG57577) fits the following vehicles: 2017-2019 Ford F-250 Super Duty; 2017-2019 Ford F-350 Super Duty; 2017-2022 Ford F-450 Super Duty. Always verify your specific year, make, and model before ordering.
Yes, the Air Lift LoadLifter 7500 XL Ultimate provides supreme support for heavy hauling 57577 (Part #BBCG57577) is designed to fit the 2017-2019 Ford F-250 Super Duty.
The Air Lift LoadLifter 7500 XL Ultimate provides supreme support for heavy hauling 57577 (Part #BBCG57577) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The LoadLifter 7500 XL Ultimate is an air spring suspension support system designed for 3/4- and 1-ton pickups and SUVs with leaf springs. It uses commercial-grade double convolute bellows (manufactured like a tire with layers of rubber and cords) to provide up to 7,500 pounds of load-leveling support. Air pressure is adjustable from 5 to 100 PSI, allowing you to maintain level ride height when carrying heavy loads.
Yes. Kit 57577 is specifically designed for Ford Super Duty trucks. The kit is recommended for most 3/4- and 1-ton pickups and SUVs with leaf springs.
No. The LoadLifter 7500 XL Ultimate kit is designed for vehicles with leaf springs only. It is not compatible with independent rear suspension or coil spring systems.
Yes. The kit accommodates both sway bar and non-sway bar equipped vehicles. During lower bracket installation, vehicles with sway bars use different hole positions: driver's (left) side uses holes farthest from the flanges, and passenger's (right) side uses holes closest to the flanges. Vehicles without sway bars use the holes farthest from the flange on both sides.
No. The kit works on vehicles with or without a factory fifth-wheel bracket. If your vehicle has a factory fifth-wheel bracket, you will need to remove the hardware from those holes during installation. The kit includes alternative 5/8" hex cap screws (part AA) and nuts (BB) for attachment if the factory bracket is absent.
The kit supports three axle diameters: 3.5", 4.0", and 4.5". You must select the correct lower leg adapter for your specific axle diameter. To determine your axle diameter, measure the circumference with a tape measure and divide by pi (3.14). Part 03913 is for 3.5" axles, 03914 for 4.0" axles, and 03915 for 4.5" axles.
Required tools include: metric and standard open-end box wrenches (set), ratchet with metric and standard sockets (set), 5/16" drill bit and drill, torque wrench, metric and standard hex key wrenches (set), hose cutter or sharp knife/razor blade, hoist or floor jack, two safety stands, safety glasses, air compressor or compressed air source, and a spray bottle with dish soap and water solution for leak testing.
The kit includes: 2 clamp bars, 2 lower brackets, 2 lower bracket cups, 2 upper chassis brackets, 2 upper air spring brackets, 1 RH upper frame brace, 1 LH upper frame brace, 2 lower leg adapters (select correct axle diameter), 4 roll plates, 2 air springs, 2 U-bolts, 8 carriage bolts (3/8"-16 x 1 1/4"), 4 button-head cap screws (M10-1.5 x 35mm), 4 carriage bolts (3/8"-16 x 10"), 2 carriage bolts (5/16"-18 x 3/4"), 18 nylon lock nuts (3/8"-16), 27 flat washers (3/8"), 4 flat washers (M8), 4 universal nuts (M10-1.5mm), 5 set screws and flanged nuts, 2 swivel elbow fittings (1/8" NPT x 1/4" PTC 90°), 8 hex bolts (3/8"-24 x 7/8"), 8 lock washers (3/8"), 3 hex-cap screws (5/8"-11 x 4 1/2"), 3 nylon lock nuts (5/8"-11), 6 flat washers (5/8"-11), 2 carriage bolts (3/8"-16 x 1"), 6 zip ties, 2 valve caps, 2 rubber washers, 2 small star washers, 4 hex nuts (5/16"), and 1 air line with 2 Schrader valves.
Yes. If you have missing or damaged parts, call Air Lift customer service at (800) 248-0892 for a replacement part.
Raise the vehicle using a hoist or floor jack and support it with at least two safety stands positioned so that the axle can be safely lowered away from the frame. This clearance is necessary to position the air spring assemblies between the axle and frame. Never work under a vehicle supported only by a jack.
The first step is to unbolt and remove the jounce bumper assembly from under the frame on both sides of the vehicle. This must be done before installing the upper chassis brackets.
Use a screwdriver to pry on the hinged end of each clip-in stud to release it. Pull all four studs out of the frame.
When installing the upper chassis bracket (part D), the large cut-out on the side of the bracket must be inboard of the frame rail, and the slotted hole in the center must be facing forward.
Install the swivel elbow fitting (part W) into the top of the air spring finger-tight, then tighten it an additional 1 1/2 turns. Do not over-tighten.
Push the upper air spring bracket (part E) as far forward as possible when securing it to the top of the air springs. This forward positioning is important for proper alignment with the frame braces.
Install the lower bracket cup (part C) onto the lower bracket main plate (part B) using a 5/16"-18 x 3/4" carriage bolt (part Q), an M8 flat washer (part T), and a 5/16"-18 nylon lock nut (part V). Tighten finger-tight only; leave it loose enough for the bracket to move freely in the slot.
For vehicles with sway bars: use the holes farthest from the flanges on the driver's (left) side, and the holes closest to the flanges on the passenger's (right) side. For vehicles without sway bars: use the square holes farthest from the flange on both sides.
Push the lower bracket as far forward as possible when attaching it to the air spring. The lower bracket cup should nest on the jounce bumper strike plate, and both flanges on the lower bracket should be locked around the stock U-bolts.
The ABS sensor line is attached to the axle via a clip on the brake line bracket. Remove this clip and zip tie the ABS sensor line to the brake hard line to keep it away from the lower support leg.
The lower clamp bar (part A) is set over the carriage bolts under the axle and secures the lower bracket assembly. It is attached with 3/8" flat washers and 3/8"-16 nylon lock nuts and must be evenly torqued to 16 lb.-ft. (22Nm).
First, remove the rearward fifth wheel bracket hardware and set it aside. Locate the two M10 bolts holding the brake line bracket to the frame, unbolt both, and pull the bracket away. Install the included set screw (part Z) into the rearward threaded hole, leaving about 30mm (1.20") protruding from the frame. Align the upper frame brace (part G) on the frame and thread the M10 flange nut (part DD) onto the set screw. Put the factory fifth wheel bolt or included 5/8" hardware (part AA) through the frame and bracket, and thread the matching nut on the bolt. Do not fully tighten at this stage.
First, locate and discard the clip holding the O2 sensor wiring harness (some models may not have this clip). If your vehicle has a factory fifth-wheel bracket, remove the hardware from those holes. Find the two holes located under the factory fifth-wheel brackets and attach the upper frame brace using the included 5/8" hex cap screws (part AA), nuts (part BB), and washers (part CC). Do not tighten fully at this stage.
The axle vent tube must be zip tied to one of the brake soft lines to keep it out of the way of the air spring assembly.
Drilling is required only for Schrader valve installation. You must drill a 5/16" (8mm) hole at your chosen location for each Schrader valve. Recommended locations are inside the fuel tank filler door, inside rear wheel wells, or the license plate or rear bumper area. No drilling is required for the main air spring assembly installation.
On vehicles with anti-sway bars, it may be necessary to trim the front carriage bolt that secures the clamp bar. No other cutting or trimming is required for the main installation. However, you must cut the air line in half using a hose cutter, razor blade, or sharp knife—do not use scissors or wire cutters.
The upper chassis bracket (part D) is installed using M10-1.5 x 35mm button-head cap screws (part O). Torque this hardware to 38 lb.-ft. (52Nm).
The upper air spring bracket (part E) is secured using 3/8"-24 x 7/8" hex bolts (part X), 3/8" lock washers (part Y), and 3/8" flat washers (part S). Torque this hardware to no more than 20 lb.-ft. (27Nm).
The lower bracket main plate (part B) is secured to the air spring using 3/8"-24 x 7/8" hex bolts (part X), 3/8" lock washers (part Y), and 3/8" flat washers (part S). Torque this hardware to no more than 20 lb.-ft. (27Nm).
The lower leg adapter is attached using a 3/8"-16 x 1 1/4" carriage bolt (part N), a nylon lock nut (part R), and a flat washer (part S). Torque the nylon lock nut to 10 lb.-ft. (14Nm).
The U-bolts (part M) are installed around the jounce bumper strike plate and secured with 3/8" flat washers (part S) and 3/8"-16 nylon lock nuts (part R). First snug the bolts evenly, just enough to hold the lower bracket flush against the stock U-bolts. After the lower clamp bar is installed and torqued, finish tightening the U-bolt hardware by torquing to 10 lb.-ft. (14Nm).
The lower clamp bar (part A) is attached with 3/8" flat washers (part S) and 3/8"-16 nylon lock nuts (part R). Evenly torque the lower clamp bar hardware to 16 lb.-ft. (22Nm).
With all hardware hand-tight, torque all 3/8" hardware (carriage bolts, flat washers, and nylon lock nuts) connecting the upper air spring brackets (part E) to the upper frame braces (parts F and G) and upper chassis brackets (part D) to 16 lb.-ft. (22Nm).
Torque the fifth wheel 5/8" hardware to 150 lb.-ft. (203Nm) for the included hardware (parts AA and BB). If using the factory fifth wheel bolt instead, torque to 180 lb.-ft. (244Nm).
The kit includes one air line with 2 Schrader valves (part KK) pre-installed. You will cut this air line in half to create two separate lines, one for each air spring. The kit also includes 6 zip ties (part FF) to secure the air lines to fixed points along the chassis.
Make clean, square cuts with a razor blade or hose cutter. Do not use scissors or wire cutters, as these will crush or damage the air line.
The minimum bend radius for the air line is 1" (25mm). Avoid sharp bends and edges, and do not pinch or kink the air line.
Leave at least 2" (50mm) of slack in the air line to allow for any movement that might pull on the air line.
Recommended locations for the Schrader valves are: inside the fuel tank filler door, inside rear wheel wells, or the license plate or rear bumper area. Choose locations that provide convenient access for inflation and pressure checking.
Drill a 5/16" (8mm) hole at your chosen location. Insert the Schrader valve through the hole from inside the vehicle. From the outside, place a rubber washer (part HH), small star washer (part II), and hex nut (part JJ) onto the valve stem and tighten. The valve cap (part GG) is then installed on the valve stem.
The maximum inflation pressure is 100 PSI (7BAR). However, the actual air pressure needed is dependent on load and gross vehicle weight rating. Never inflate beyond 100 PSI.
The minimum recommended pressure is 5 PSI (0.34BAR).
Keep at least 6" (150mm) of clearance between all air lines and the exhaust system. Avoid sharp bends and edges. If a heat shield was included in the kit, install it. If there is no heat shield but one is required, call Air Lift customer service at (800) 248-0892.
The heat shield protects the air line from heat damage. Attach the metal heat shield to the exhaust where it is closest to the air spring. Slide the air line thermal sleeve over the air line and place it where the air line is closest to the exhaust. There should be at least 1/2" (13mm) of dead air space between the shield and exhaust. Double hose clamps may be necessary if needed.
Do not exceed the maximum gross vehicle weight rating (GVWR) or payload rating as indicated by the vehicle manufacturer. Always maintain normal ride height and never inflate the air springs beyond 100 PSI (7BAR).
It will be necessary to push the hard brake line away from the lower bracket carriage bolt if the line is resting on it. This prevents damage to the brake line and ensures proper clearance.
Perform the following checks in order: (1) Clearance test—inflate to 40-60 PSI and verify at least 1/2" (13mm) clearance from anything that might rub (tire, brakes, frame, shock absorbers, brake cables); (2) Leak test—inflate to 40-60 PSI and check all connections for leaks using a soapy water solution; (3) Heat test—verify at least 6" (152mm) clearance from heat sources; (4) Fastener test—recheck all bolts for proper torque; (5) Road test—drive 10 miles (16km) and recheck for clearance, loose fasteners, and air leaks.
Inflate the air springs to 40-60 PSI (2.8-4.1BAR) for both the clearance test and leak test.
Use a spray bottle with a dish soap and water solution. Inflate the air springs to 40-60 PSI (2.8-4.1BAR) and apply the soapy water solution to all air line connections and the inflation valve core. Bubbles will form at any leak location. All leaks must be eliminated before the vehicle is road tested.
Check air pressure weekly to ensure the system is maintaining proper pressure and to detect any slow leaks.
Use a soapy water solution to check all air line connections and the inflation valve core before deflating and removing the air spring. This will help you identify the source of the leak so it can be repaired.
Yes, kit 57577 is designed for Ford Super Duty trucks. It fits most 3/4- and 1-ton pickups and SUVs with leaf springs.
The kit supports 3.5", 4.0", and 4.5" axle diameters. You must select the correct lower leg adapter (part 03913, 03914, or 03915) for your axle diameter.
Required tools include: wrenches and sockets (metric and standard), 5/16" drill bit, torque wrench, hex keys, hose cutter or sharp knife, hoist or floor jack, two safety stands, safety glasses, air compressor, and a spray bottle with soapy water for leak testing.
Drilling is required only for Schrader valve installation (5/16" hole). No drilling is required for the main air spring assembly. On vehicles with anti-sway bars, the front carriage bolt securing the clamp bar may need trimming.
Upper chassis bracket: 38 lb.-ft. (52Nm). Upper air spring bracket and lower bracket main plate: 20 lb.-ft. (27Nm) maximum. Lower leg adapter: 10 lb.-ft. (14Nm). U-bolts: 10 lb.-ft. (14Nm). Lower clamp bar: 16 lb.-ft. (22Nm). Upper frame braces and upper air spring brackets: 16 lb.-ft. (22Nm). Fifth wheel hardware: 150 lb.-ft. (203Nm) for included hardware, 180 lb.-ft. (244Nm) for factory bolt.
Maximum pressure is 100 PSI (7BAR). Before operating, perform clearance test (40-60 PSI), leak test (40-60 PSI with soapy water), heat test (6" clearance from exhaust), fastener test (recheck torque), and road test (10 miles, recheck clearance and fasteners).
Use zip ties to secure the air line to fixed chassis points. Maintain at least 6" clearance from the exhaust system, minimum 1" bend radius, and at least 2" slack for movement. Cut the air line with a hose cutter or razor blade (not scissors). Install a heat shield if included.
Use a spray bottle with a dish soap and water solution to identify the exact location of the leak. Check all air line connections and the inflation valve core. Bubbles will form at the leak source. Repair or replace the leaking component before road testing the vehicle.
Inflate the air springs to 40-60 PSI and check clearance from the tire, brakes, frame, shock absorbers, and brake cables. If clearance is less than 1/2" (13mm), verify that all components are properly positioned and torqued. Recheck the installation of the upper and lower brackets to ensure they are positioned correctly. If clearance issues persist, contact Air Lift customer service at (800) 248-0892.
After driving 10 miles (16km), recheck all bolts for proper torque using a torque wrench. Refer to the torque specifications for each component: upper chassis bracket (38 lb.-ft.), upper air spring bracket and lower bracket main plate (20 lb.-ft. maximum), lower leg adapter (10 lb.-ft.), U-bolts (10 lb.-ft.), lower clamp bar (16 lb.-ft.), upper frame braces (16 lb.-ft.), and fifth wheel hardware (150 or 180 lb.-ft. depending on hardware type).
3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2017 - 2019 | Ford F-250 Super Duty | Does not fit Commercial Chassis |
| 2017 - 2019 | Ford F-350 Super Duty | Does not fit Commercial Chassis |
| 2017 - 2022 | Ford F-450 Super Duty | Does not fit Commercial Chassis |
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