Flipping trailer shackles is a modification that increases the ride height and ground clearance of a trailer by relocating the leaf spring suspension system from below the axle to above it. This effectively positions the axle higher relative to the trailer frame, providing valuable inches for navigating rough terrain and overcoming obstacles.
Understanding Trailer Shackle Flipping
Trailer shackle flipping, also known as axle flipping or spring-over conversion, is a popular modification among off-road enthusiasts, overlanders, and anyone who tows a trailer on uneven surfaces. The goal is to gain increased ground clearance to prevent the trailer’s underside from scraping, dragging, or otherwise encountering obstructions. However, this modification should only be undertaken with careful consideration and proper execution. A poorly executed shackle flip can compromise the trailer’s stability, handling, and overall safety.
Benefits of Flipping Trailer Shackles
The primary benefit of flipping trailer shackles is the significant increase in ground clearance. This is especially important for trailers used in off-road or unimproved road conditions. Increased clearance allows the trailer to clear rocks, logs, and other obstacles without damage. Other advantages include:
- Improved departure angle: A higher rear end improves the departure angle, reducing the risk of the trailer dragging when exiting steep inclines.
- Leveling the trailer: Flipping shackles can help level a trailer that sits too low in the back, especially when paired with a lifted tow vehicle.
- Enhanced aesthetics: Some owners simply prefer the look of a trailer with increased ride height.
Risks and Considerations Before Flipping Shackles
While the benefits are appealing, flipping trailer shackles isn’t a decision to be taken lightly. It’s crucial to be aware of the potential risks and considerations:
- Potential for instability: Raising the trailer’s center of gravity can make it more susceptible to swaying and tipping, especially at higher speeds or in windy conditions.
- Modification of braking system: In some cases, flipping shackles may require modifications to the trailer’s braking system, particularly the brake lines.
- Changes to trailer’s geometry: This modification alters the trailer’s geometry, potentially affecting its handling and towing characteristics.
- Legal and insurance implications: Check local regulations and your insurance policy to ensure that shackle flipping is permitted and doesn’t void your coverage.
- Installation complexity: The installation process can be challenging and requires welding skills and a thorough understanding of trailer suspension systems. Improper installation can lead to catastrophic failure.
- Necessity of additional modifications: Depending on the amount of lift achieved, other components like the hitch coupler, safety chains, and electrical wiring might need to be adjusted or extended.
The Step-by-Step Process of Flipping Trailer Shackles
Flipping trailer shackles typically involves the following steps. Professional installation is highly recommended. This is a generalized guide and specific procedures may vary based on trailer design and shackle flip kit.
- Preparation: Gather all necessary tools and materials, including a shackle flip kit (if using), jack stands, a welder, a grinder, measuring tools, safety glasses, and gloves. Thoroughly inspect the trailer’s frame and suspension components for any signs of damage or wear.
- Disconnecting the Suspension: Safely jack up the trailer and support it with jack stands. Disconnect the leaf springs from the axle. This usually involves removing U-bolts.
- Preparing the Axle: The axle needs to be positioned above the leaf springs. This often requires welding new spring perches (saddles) onto the axle on the opposite side of the existing ones. These new perches provide a mounting point for the leaf springs. The old perches may need to be ground off.
- Welding New Spring Perches: Ensure that the new spring perches are properly aligned and securely welded to the axle. Accurate alignment is crucial for maintaining proper tracking and preventing uneven tire wear. Incorrect welding can compromise the structural integrity of the axle.
- Attaching the Leaf Springs: Once the new spring perches are in place, reattach the leaf springs to the axle using new U-bolts and mounting hardware. Tighten the U-bolts to the manufacturer’s specified torque.
- Adjusting Other Components: Check and adjust other components as needed, such as brake lines, hitch coupler, safety chains, and electrical wiring. These components may need to be extended or modified to accommodate the increased ride height.
- Testing and Inspection: After completing the shackle flip, thoroughly inspect all welds, connections, and adjustments. Perform a test tow to ensure that the trailer handles properly and that there are no signs of instability or binding. Regularly inspect the modified suspension system after initial use.
FAQs About Flipping Trailer Shackles
Here are frequently asked questions to further clarify the process and considerations:
FAQ 1: What tools do I need to flip trailer shackles?
You’ll need a jack, jack stands, a welder, a grinder, wrenches, sockets, U-bolts, spring perches (if not using a kit), a measuring tape, safety glasses, gloves, and a torque wrench. A quality shackle flip kit provides pre-fabricated components and instructions specific to your trailer model.
FAQ 2: How much lift will I get from flipping trailer shackles?
The amount of lift gained depends on the trailer’s original suspension configuration and the size of the axle. Generally, you can expect to gain anywhere from 4 to 6 inches of lift.
FAQ 3: Do I need a shackle flip kit, or can I do it myself?
While you can source the individual components and perform the shackle flip yourself, a shackle flip kit offers several advantages: pre-fabricated components, detailed instructions, and guaranteed compatibility with your trailer. If you lack welding experience or are unsure about the proper alignment and installation procedures, using a kit is highly recommended.
FAQ 4: Will flipping trailer shackles affect the trailer’s braking system?
Yes, flipping shackles can affect the braking system, particularly if you’re dealing with surge brakes. You may need to extend the brake lines to accommodate the increased ride height. In some cases, you might also need to adjust the brake actuator. Always check the brake function after performing the flip.
FAQ 5: How does flipping shackles affect the trailer’s stability?
Raising the trailer’s center of gravity can negatively impact stability. It’s crucial to ensure that the trailer is properly balanced and that the load is distributed evenly. Consider adding sway control devices to mitigate any instability issues. Driving at reduced speeds is also recommended after this modification.
FAQ 6: Is shackle flipping legal in my state?
Regulations regarding trailer modifications vary by state. Check your local regulations to ensure that shackle flipping is permitted and that you comply with all relevant safety standards.
FAQ 7: Can I flip shackles on a torsion axle trailer?
No, shackle flipping is only applicable to trailers with leaf spring suspension. Torsion axles have a different suspension design that doesn’t allow for this type of modification.
FAQ 8: How do I choose the right U-bolts for my flipped shackles?
Choose U-bolts that are the correct diameter for your axle and spring perches and are long enough to accommodate the added thickness of the flipped suspension. Always use new U-bolts, as old ones may be weakened and prone to failure.
FAQ 9: How do I know if my welds are strong enough?
Proper welding is crucial for a safe and reliable shackle flip. If you lack welding experience, it’s best to hire a professional welder. Ensure that the welds are clean, free of porosity, and penetrate deeply into the metal. Visually inspect the welds for any signs of cracks or defects.
FAQ 10: What is spring over axle (SOA) conversion?
Spring Over Axle (SOA) conversion is another term for flipping trailer shackles. It describes the process of moving the leaf springs from below the axle (spring under axle – SUA) to above the axle.
FAQ 11: What are the alternatives to flipping shackles for gaining ground clearance?
Alternatives include using larger tires, installing a custom suspension system with a built-in lift, or purchasing a trailer with a higher ride height from the factory. Each option has its own advantages and disadvantages. Larger tires may require modifications to the trailer’s fenders or frame.
FAQ 12: How often should I inspect the flipped shackles after installation?
Regularly inspect the flipped shackles and related components, such as U-bolts, spring perches, and welds, especially after initial use and before long trips. Check for any signs of loosening, wear, or damage. Retorque the U-bolts as needed. Promptly address any issues to prevent potential failures.