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Air Lift
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Never sacrifice your towing ability, even if your truck is lifted. Our universal air spring cradle allows for full extension of the suspension, providing the air spring a place to set into on compression and during everyday driving.
Never sacrifice your towing ability, even if your truck is lifted. Air Lift’s universal air spring cradle allows for full extension of the suspension, providing the air spring a place to set into on compression and during everyday driving. Maintain your towing ability and keep your ride at the height you want. Having your truck lifted is perfect for anyone who wants the look, needs to clear serious obstacles, or wants to retain a full suspension extension. Adding air bags can improve ride quality and prevent your vehicle's rear end from squatting or sagging when weighed down. However, installing air bags may limit your suspension extension if your truck is lifted. Adding Air Lift’s universal air spring cradle allows the air spring to cycle safely and have full suspension travel. The cradle keeps the air bag in place but detached from the lower bracket, letting it react as necessary to the road. This way, you can keep your vehicle’s height without sacrificing a smooth ride and towing abilities. Air Lift’s universal air spring cradle fits all Air Lift bellows-style air spring kits and most other brands. In addition, the cradle’s design allows the ability to mount the included hardware up or down based on the air springs and brackets. The universal air spring cradle kit is made with lightweight, durable resin, recessed mounting holes, and draining holes to help clear water and debris. The kit has two cradles, the hardware needed, and its instruction manual. For over 75 years, Air Lift has been the leader in air suspension products and is committed to delivering quality parts that last. To ensure the highest quality, longevity, and customer satisfaction, the system comes with a two-year warranty and a 60-day, no-questions-asked, money-back guarantee – not to mention Air Lift's reputation for excellent customer service and technical support, should you run into any snags in the installation process.

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 Universal Air Spring Cradle is a support component designed for Air Lift air suspension systems on lifted vehicles. It provides a mounting surface for the air spring opposite the air fitting end, replacing the lower roll plate function. The cradle maintains proper air spring alignment and contact during suspension travel.
The cradle is designed and confirmed to work with all Air Lift air spring kits using 1B6 single and 2B6 double-bellow air springs, including LoadLifter 5000 Series and PROSeries. Although the kit is universal and may work with other air spring brands, it may not work with every manufacturer or application. You must confirm bolt configuration compatibility with your air spring kit manufacturer before installation.
The cradle is compatible with the following Air Lift air spring part numbers: 58439, 58494, 58939, 58994, 58437, 58946, 58937, 58996, 58740, and 58940. These are 1B6 single and 2B6 double-bellow air springs. Each has a specific recommended design height: 5.5" for 58439/58494/58939/58994; 6" for 58437/58946/58937/58996; and 5" for 58740/58940.
Yes. The installation guide assumes air springs have previously been installed on the vehicle. If air springs are not currently installed, you must follow the air spring kit installation guide up to the point of attaching the air spring to the lower bracket before proceeding with cradle installation.
Design height is the distance between the mounting brackets minus the cradle thickness (0.83") and any lift spacer height. This dimension should ideally be close to the air spring's design height +/- 1.0", with the upper portion of the range being ideal. Adequate design height is critical because ride and air spring performance may be affected if insufficient travel is provided for the air spring.
The cradle thickness is 0.83 inches. This measurement is used when calculating the design height of the air spring to ensure proper clearance and suspension travel.
A lift spacer may be needed depending on your application. The cradle can be mounted between air spring kit brackets (without a spacer) or in a lifted application using a lift spacer. You must measure the distance between your brackets and compare it to the required design height for your air spring. If the measurement is not within +/- 1.0" of the design height, you will need to select an appropriate lift spacer height. Refer to http://www.airliftcompany.com/workshop/determine-correct-lift-spacer/ to determine which spacer may be needed for your application.
Brake line bracket modifications may be needed based on the lift kit manufacturer's design. Most modifications to the emergency brake line or electrical wires/cables are addressed in the air spring kit's installation guide, but the lift kit manufacturer may have different modifications that affect this installation. Review your air spring kit's installation guide for specific modification requirements.
The following tools are required: 9/16" socket, 9/16" wrench, ratchet, torque wrench, 7/32" hex-key wrench, and safety glasses.
The kit includes: 4 × 3/8"-24 thin nylon lock nuts, 8 × flat washers, 2 × air spring cradles, 4 × 3/8"-24 x 1" hex drive flat head screws, 4 × 3/8"-24 x 1" button head hex drive screws, and 4 × 3/8"-24 x 1" hex head cap bolts. If any parts are missing or damaged, contact Air Lift customer service at (800) 248-0892.
Release all air from the air springs before beginning installation.
Measure the distance between your mounting brackets. If using the cradle without a lift spacer (Fig. 2), subtract the cradle thickness (0.83") from this measurement. If using a lift spacer (Fig. 3), subtract both the cradle thickness (0.83") and the lift spacer height. The resulting dimension should be close to your air spring's design height +/- 1.0", with the upper portion of the range being ideal. Refer to Fig. 4 for the design height of your specific air spring part number.
The cradle is only to be used on the air spring side (or end) opposite the air fitting. It must not be installed on the end where the air fitting is located.
Yes, if applicable to your application. The lower roll plate should be discarded because its function is replaced by the air spring cradle.
The air spring and universal air spring cradle should be aligned so that the air spring is contacting the cradle in the center. This ensures proper support and suspension performance.
Torque the air spring cradle hardware to 20 lb.-ft. (27 Nm).
Yes. The cradle has been designed to install the hardware either facing up or down. However, the hardware must not extend beyond the spring contact surface.
There must be at least 1/2" (13 mm) of clearance from the inflated air spring and its mounting brackets throughout the full travel of the suspension. With air springs inflated to 40-60 PSI (2.8-4.1 bar), ensure there is at least 1/2" (13 mm) clearance from anything that might rub against each air spring, including tires, frame, wires, hoses, shock absorbers, brake lines, brackets and cables.
After reattaching the lower bracket to the vehicle, cycle the suspension to make sure the air spring has 1/2" (13 mm) of clearance all the way around. With air springs inflated to 40-60 PSI (2.8-4.1 bar), check the clearance of tires, frame, wires, hoses, shock absorbers, brake lines, brackets and cables to ensure nothing rubs against the air springs.
No. The installation of this kit does not alter the gross vehicle weight rating (GVWR) or payload of the vehicle. You must check your vehicle's owner's manual and not exceed the maximum load listed for your vehicle.
GVWR (Gross Vehicle Weight Rating) is the maximum allowable weight of the fully loaded vehicle, including passengers and cargo. This number, along with other weight limits, tire and rim size, and inflation pressure data, is shown on the vehicle's Safety Compliance Certification Label. You must not exceed your vehicle's GVWR when using the Universal Air Spring Cradle.
Payload is the combined, maximum allowable weight of cargo and passengers that the truck is designed to carry. It is calculated as GVWR minus the base curb weight. The Universal Air Spring Cradle does not change your vehicle's payload, so you must not exceed the maximum payload listed in your vehicle's owner's manual.
Yes. The cradle can be used with Air Lift Company lift spacer kits. When using a lift spacer, you will not need all the hardware provided with the lift spacer kit. The hardware in the Universal Air Spring Cradle kit is to be used between the cradle and the lift spacer.
The Universal Air Spring Cradle is designed for Air Lift air springs (1B6 and 2B6 types). It may work with other brands but you must confirm bolt configuration compatibility with your air spring kit manufacturer before installing.
You need: 9/16" socket, 9/16" wrench, ratchet, torque wrench, 7/32" hex-key wrench, and safety glasses.
A lift spacer may be needed depending on your application. Measure the distance between your mounting brackets and compare to your air spring's design height. If the measurement is not within +/- 1.0" of design height, you will need a lift spacer. Visit http://www.airliftcompany.com/workshop/determine-correct-lift-spacer/ to determine which spacer you need.
Torque all air spring cradle hardware to 20 lb.-ft. (27 Nm).
Maintain at least 1/2" (13 mm) clearance from the inflated air spring throughout full suspension travel. Check clearance of tires, frame, wires, hoses, shock absorbers, brake lines, brackets and cables with air springs at 40-60 PSI.
Yes. Air springs must be previously installed on the vehicle. Follow your air spring kit installation guide up to the point of attaching the air spring to the lower bracket before installing the cradle.
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