Upgrading to a short long arm suspension can dramatically improve your vehicle’s off-road capability, ride comfort, and handling. Whether you’re tackling rocky trails or cruising down the highway, this suspension system offers better wheel articulation and reduced axle wrap.
If you’re serious about off-roading or just want a smoother, more controlled ride, upgrading your suspension is one of the best modifications you can make. Among the many options available, the short long arm suspension stands out as a favorite among off-road enthusiasts and daily drivers alike. Unlike traditional short arm setups, short long arm suspension offers a unique blend of performance, comfort, and durability that can transform how your vehicle handles both on and off the pavement.
So, what exactly is short long arm suspension? In simple terms, it’s a type of independent front suspension (IFS) or solid axle setup that uses longer upper and lower control arms than the factory configuration. These extended arms change the suspension’s geometry, allowing for greater wheel travel, better alignment stability, and reduced stress on components. Whether you drive a Jeep, truck, or SUV, this upgrade can make a noticeable difference in how your vehicle responds to bumps, corners, and rough terrain.
Key Takeaways
- Enhanced Off-Road Performance: Short long arm suspension allows greater wheel travel and improved traction on uneven terrain.
- Smoother Ride Quality: The longer control arms reduce harsh impacts, offering a more comfortable ride on and off the road.
- Reduced Axle Wrap: Better geometry minimizes torque-induced axle rotation, improving power delivery and stability.
- Customizable Ride Height: Easily adjust lift height to suit your driving needs without sacrificing suspension performance.
- Improved Steering Response: Properly aligned long arms enhance steering precision and reduce bump steer.
- Durability and Strength: High-quality components withstand heavy loads and extreme conditions better than stock setups.
- Professional Installation Recommended: While DIY is possible, expert setup ensures optimal performance and safety.
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What Is Short Long Arm Suspension?
Short long arm suspension—sometimes called SLA suspension—is a modification that replaces your vehicle’s stock control arms with longer ones, typically on the front axle. The “short” and “long” refer to the relative lengths of the upper and lower control arms. In a true SLA setup, the lower arms are significantly longer than the upper arms, creating a more favorable suspension geometry.
This design improves several key aspects of vehicle dynamics. First, it increases wheel travel, which means your tires can stay in contact with the ground longer over bumps and dips. Second, it reduces the rate at which camber changes during suspension movement, helping maintain better tire contact and grip. Third, it minimizes unwanted steering effects like bump steer, where the wheels turn slightly when the suspension compresses.
Most short long arm kits are designed for solid axle vehicles like Jeeps, but some IFS trucks can also benefit from modified long arm setups. The goal is always the same: better control, more comfort, and improved off-road capability.
Benefits of Upgrading to Short Long Arm Suspension
Upgrading to a short long arm suspension isn’t just about lifting your vehicle—it’s about improving how it performs. Here are some of the top benefits you can expect:
Improved Wheel Articulation
One of the biggest advantages of long arm suspension is increased wheel articulation. This means your wheels can move up and down more independently, which is crucial when navigating rocky trails or uneven terrain. Better articulation keeps your tires planted, improving traction and reducing the chance of getting stuck.
For example, imagine driving over a large rock with one front wheel. With a stock suspension, the opposite wheel might lift off the ground, losing traction. But with short long arm suspension, the extended control arms allow more vertical movement, helping the lifted wheel stay down and maintain grip.
Smoother Ride Quality
Longer control arms change the suspension’s motion ratio, which affects how forces are transferred from the wheels to the chassis. This results in a softer, more compliant ride—even on rough roads. You’ll notice fewer jolts and bumps, making long drives more comfortable for you and your passengers.
Many drivers report that their vehicles feel “glossier” after the upgrade, especially when combined with quality shocks and springs. It’s like upgrading from a stiff office chair to a plush recliner—same function, but way more comfortable.
Reduced Axle Wrap and Torque Steer
Axle wrap happens when the axle rotates under heavy torque, causing the suspension to bind or the vehicle to hop. This is common in lifted trucks and Jeeps with stock control arms. Short long arm suspension reduces this effect by improving the suspension’s leverage and alignment.
Similarly, torque steer—where the vehicle pulls to one side under acceleration—is minimized because the longer arms help keep the axle centered and stable. This is especially helpful in 4×4 vehicles with big tires and powerful engines.
Better Steering and Handling
With improved suspension geometry, your steering becomes more predictable and responsive. Bump steer—the unwanted turning of wheels when hitting bumps—is greatly reduced. This means you can drive faster and more confidently on uneven roads without fighting the wheel.
Additionally, the longer arms help maintain proper caster and camber angles, which are essential for stable handling and even tire wear. You’ll notice tighter cornering and less wandering at highway speeds.
Choosing the Right Short Long Arm Suspension Kit
Not all short long arm kits are created equal. When shopping for an upgrade, consider the following factors to ensure you get the best performance for your needs.
Vehicle Compatibility
First and foremost, make sure the kit is designed for your specific make, model, and year. Some kits are universal, but most are engineered for particular vehicles like the Jeep Wrangler TJ, JK, or JL, or Ford Super Duty trucks. Using the wrong kit can lead to poor performance or even safety issues.
Lift Height and Clearance
Short long arm kits are often sold with a recommended lift range—typically between 2.5 and 6 inches. Choose a kit that matches your desired ride height. Going too high without proper components can strain steering and drivetrain parts.
Also, check for adequate clearance between the new control arms and other components like the frame, engine, or steering linkage. Some kits require minor modifications or additional brackets.
Material and Build Quality
Look for kits made from high-strength steel or chromoly, with reinforced mounting points and quality bushings or joints. Cheap kits may save money upfront but can fail prematurely under stress.
Top brands like Teraflex, RockJock, and BDS Suspension offer durable, well-engineered kits with detailed instructions and customer support.
Included Components
A complete short long arm kit should include upper and lower control arms, mounting brackets, bushings, and hardware. Some also come with adjustable track bars, sway bar links, or shocks. The more included, the better—just make sure everything is compatible.
Installation Tips and Best Practices
Installing a short long arm suspension is a big job, but with the right tools and preparation, it’s doable for experienced DIYers. However, if you’re not confident in your mechanical skills, it’s best to have a professional handle the installation.
Preparation and Safety
Before you start, gather all necessary tools: jack stands, torque wrench, impact driver, spring compressors (if needed), and a friend to help. Always work on a level surface and use proper safety gear.
Disconnect the battery and support the vehicle securely. Never rely solely on a jack—use jack stands and wheel chocks.
Step-by-Step Installation Overview
1. Lift the vehicle and remove the wheels.
2. Disconnect the steering linkage, sway bar, and shocks.
3. Unbolt the stock control arms from the frame and axle.
4. Install the new long arms using the provided brackets and hardware.
5. Reconnect all components and torque bolts to spec.
6. Reinstall wheels and lower the vehicle.
7. Get a professional alignment—this is critical for proper handling and tire wear.
Alignment and Tuning
After installation, your vehicle will need a full alignment. Short long arm suspension changes the suspension geometry, so caster, camber, and toe must be adjusted correctly. Skipping this step can lead to poor handling, uneven tire wear, and steering issues.
Some kits allow for adjustable control arms, which let you fine-tune the alignment at home. This is a great feature if you plan to change lift height or tire size in the future.
Maintenance and Long-Term Care
Like any suspension system, short long arm suspension requires regular maintenance to perform at its best.
Inspect Bushings and Joints
Check control arm bushings and joints every 10,000 miles or after serious off-road trips. Look for cracks, tears, or excessive play. Worn bushings can cause noise, poor handling, and premature wear on other components.
Lubricate Moving Parts
If your kit uses greaseable joints or heim joints, lubricate them according to the manufacturer’s recommendations. This prevents corrosion and ensures smooth movement.
Monitor Alignment
After hitting large obstacles or installing new tires, have your alignment checked. Even small changes can affect how your vehicle drives.
Upgrade Supporting Components
To get the most from your short long arm suspension, consider upgrading related parts like shocks, springs, track bars, and steering stabilizers. A well-balanced system performs better and lasts longer.
Conclusion
Upgrading to a short long arm suspension is one of the most effective ways to enhance your vehicle’s performance, comfort, and off-road capability. Whether you’re crawling over rocks, towing a trailer, or just driving down a bumpy backroad, this modification delivers real-world benefits that you’ll feel every time you get behind the wheel.
From improved wheel articulation and smoother rides to better steering and reduced axle wrap, the advantages are clear. Just remember to choose a quality kit, follow proper installation procedures, and maintain your system regularly. With the right setup, your vehicle will handle like a dream—on and off the trail.
So if you’re ready to take your ride to the next level, a short long arm suspension upgrade might be exactly what you need. It’s not just about looking tough—it’s about driving better.
Frequently Asked Questions
What is the difference between short arm and short long arm suspension?
Short arm suspension uses control arms similar in length to the factory setup, limiting wheel travel and articulation. Short long arm suspension features longer lower control arms, improving geometry, ride quality, and off-road performance.
Can I install short long arm suspension myself?
Yes, if you have mechanical experience and the right tools. However, due to the complexity and safety concerns, many prefer professional installation to ensure proper alignment and function.
Does short long arm suspension require a lift?
Most short long arm kits are designed for lifted vehicles (2.5–6 inches), but some can work with minimal lift. Always check the manufacturer’s recommendations for your specific setup.
Will this upgrade affect my daily driving?
Generally, no—most drivers report improved comfort and handling on paved roads. However, improper installation or poor alignment can cause issues like bump steer or uneven tire wear.
How much does a short long arm suspension kit cost?
Prices range from $800 to $2,500+, depending on the brand, materials, and included components. High-end kits with adjustable arms and premium parts cost more but offer greater flexibility and durability.
Do I need to upgrade other parts when installing short long arm suspension?
While not always required, upgrading shocks, track bars, and steering components can maximize performance and ensure all parts work together smoothly.