Air Lift – LoadLifter 5000 Ultimate Rear Air Spring Kit – 2017–2024 Ford Super Duty 4WD – 88399

The Air Lift LoadLifter 5000 Ultimate Air Spring Kit (88399) is designed to deliver reliable towing and hauling support for 2017–2024 Ford Super Duty trucks, offering up to 5,000 lbs. of load-leveling capacity with the added protection of an internal jounce bumper. This Ultimate-series design allows the air springs to safely absorb shock and prevent damage when operating with little or no air pressure.

Fully adjustable from 5–100 PSI, the LoadLifter 5000 Ultimate improves ride quality whether loaded or unloaded by reducing squat, minimizing bottoming out, and enhancing overall vehicle stability. It’s an ideal solution for work trucks, frequent towing, and heavy payload applications where durability and comfort are essential.

This rear air spring kit installs with no drilling required and is compatible with factory in-bed hitch systems and most side-mount fifth-wheel hitch applications, making it a versatile option for towing setups.

Key Features

• Up to 5,000 lbs. of load-leveling capacity*
• Internal jounce bumper helps absorb shock and prevent air spring damage
• Reduces squat, bottoming out, and harsh ride
• Fully adjustable air pressure from 5–100 PSI
• Improves towing stability and ride comfort
• Helps reduce strain on factory suspension
• No drilling required for installation
• Rear air spring kit

Fitment

Fits the following vehicles:

• 2017–2024 Ford F-250 Super Duty 4WD (SRW & DRW)

• 2017–2024 Ford F-350 Super Duty 4WD (SRW & DRW)

• 2017–2024 Ford F-450 Super Duty 4WD

Fitment Notes:

• Fits ALL models without a fifth-wheel hitch

• Compatible with factory in-bed hitch systems

• Compatible with most side-mount fifth-wheel hitch applications

• Does NOT fit cab & chassis applications

Specifications

• Part Number: 88399

• Series: LoadLifter 5000 Ultimate

• Application Type: Rear Kit

• Load-Leveling Capacity: Up to 5,000 lbs.*

• Replacement Air Spring: 84293

• Drilling Required: No

Dimensions & Weight:

• Weight: 35.4 lb

• Width: 9.25 in

• Depth: 14.125 in

• Height: 10.75 in

*Load-leveling capacity is based on air spring system capacity and does not increase GVWR.