Product Description
The AIR LIFT 57390 LoadLifter 5000 Helper Spring Kit is designed to dramatically improve towing stability and load support for the 1999-2004 Ford F-250 and F-350 Super Duty 4WD trucks equipped with an in-bed hitch. Built for serious towing and hauling applications, this heavy-duty air suspension system delivers up to 5,000 pounds of load-leveling capacity, helping eliminate rear-end squat, trailer sway, and bottoming out when carrying heavy payloads or towing large trailers.
The LoadLifter 5000 system installs between the frame and rear leaf springs to provide adjustable support ranging from 5-100 PSI, allowing drivers to dial in the exact suspension support required for different loads. Whether towing a fifth-wheel camper, hauling construction equipment, or pulling a gooseneck trailer, the AIR LIFT 57390 restores proper ride height while improving braking performance and steering control.
Constructed with reinforced two-ply rubber air springs and heavy-duty mounting brackets, the system is engineered for durability in demanding towing environments. Protective roll plates help extend air spring life while distributing load more evenly across the suspension. The kit includes all brackets, airlines, fittings, and hardware required for installation.
Key Features
- Up to 5,000 lbs of load leveling capacity
- Reduces suspension squat when towing heavy loads
- Improves braking stability and steering response
- Adjustable air pressure from 5-100 PSI
- Durable double convoluted air springs
- Protective roll plates extend air spring life
- Compatible with many gooseneck and fifth-wheel hitch setups
- Includes mounting brackets, air lines, and hardware
- Compatible with Air Lift onboard compressor systems
- Limited lifetime warranty
Fitment
Vehicle Compatibility
- 1999 Ford F-250 Super Duty 4WD
- 2000 Ford F-250 Super Duty 4WD
- 2001 Ford F-250 Super Duty 4WD
- 2002 Ford F-250 Super Duty 4WD
- 2003 Ford F-250 Super Duty 4WD
- 2004 Ford F-250 Super Duty 4WD
- 1999 Ford F-350 Super Duty 4WD
- 2000 Ford F-350 Super Duty 4WD
- 2001 Ford F-350 Super Duty 4WD
- 2002 Ford F-350 Super Duty 4WD
- 2003 Ford F-350 Super Duty 4WD
- 2004 Ford F-350 Super Duty 4WD
Designed for trucks equipped with rear leaf springs and compatible with many in-bed hitch configurations including gooseneck and fifth-wheel towing setups.
Specifications for AIR LIFT 57390
| Specification | Details |
|---|---|
| Brand | Air Lift |
| Part Number | 57390 |
| UPC | 729199573903 |
| GTIN | 729199573903 |
| Load Capacity | Up to 5,000 lbs |
| Air Pressure Range | 5-100 PSI |
| Air Spring Type | Double Convoluted Bellows |
| Location | Rear Axle |
| Shipping Weight | Approx. 35.3 lbs |
| Installation | Bolt-On Installation (no frame drilling required) |
| Prop 65 Warning | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
FAQ
How much load support does the Air Lift 57390 provide?
The LoadLifter 5000 system provides up to 5,000 pounds of load-leveling capacity to help maintain proper ride height when towing or hauling heavy loads.
Is this kit compatible with gooseneck or fifth-wheel hitches?
Yes. The AIR LIFT 57390 is designed to work with many in-bed hitch setups commonly used on Ford Super Duty trucks.
Can I install an onboard compressor?
Yes. Air Lift compressor systems such as WirelessONE or LoadController kits allow drivers to adjust air pressure from inside the cab.
Will this increase my truck’s towing capacity?
No. Air springs improve load support and stability but do not increase the manufacturer’s GVWR or towing rating.
Does the system affect ride quality when empty?
No. When set to the minimum pressure of about 5 PSI, the air springs maintain factory ride comfort while remaining ready to support heavy loads.
