Step-by-Step Guide for Replacing Worn Out Leaf Springs with Flexiride

Worn-out leaf springs can severely impact your vehicle’s ride quality, handling, and safety. Over time, these crucial suspension components can sag, crack, or lose their elasticity, leading to a bumpy ride, reduced load-carrying capacity, and uneven tire wear. Upgrading to Flexiride springs offers a superior solution, providing enhanced durability, improved ride comfort, and often a more robust design tailored for demanding applications. This comprehensive guide will walk you through the process of replacing your old leaf springs with new Flexiride units, ensuring a smooth and successful upgrade.

Why Upgrade to Flexiride Springs?

Flexiride springs are engineered for performance and longevity. Unlike traditional multi-leaf springs, Flexiride often utilizes a unique design that can offer better shock absorption, reduced noise, and increased stability, especially under heavy loads or on challenging terrain. Their advanced construction materials and design principles mean a more comfortable ride for you and better protection for your cargo, making them an excellent investment for trailers, RVs, and commercial vehicles.

Tools and Materials You’ll Need

Before you begin, gather all necessary tools and materials to ensure a seamless process:

New Flexiride leaf springs (ensure they are the correct fit for your vehicle/trailer)
Jack stands (at least two, preferably four for stability)
Hydraulic jack or bottle jack
Wheel chocks
Socket wrench set (metric and/or standard, depending on your hardware)
Open-end wrench set
Torque wrench
Impact wrench (optional, but highly recommended for stubborn bolts)
Penetrating oil (e.g., WD-40, PB Blaster)
Wire brush
Grinder or cutting tool (for seized bolts, as a last resort)
Hammer or mallet
Safety glasses and gloves
Grease gun (if your new springs have greaseable shackles)

Safety First: Critical Precautions

Safety is paramount when working under a vehicle or trailer.

Always work on a flat, level surface.
Use wheel chocks on the wheels that will remain on the ground to prevent accidental movement.
Never rely solely on a jack to support the vehicle. Always use sturdy jack stands placed under a strong frame point.
Wear safety glasses to protect your eyes from debris, rust, or lubricants.
Wear gloves to protect your hands.
Ensure the vehicle is stable and cannot roll or fall before getting underneath.

Step 1: Vehicle Preparation

Park your vehicle or trailer on a level surface. Engage the parking brake. If working on a trailer, chock the wheels on the opposite axle. If working on a vehicle, chock the front wheels securely. Loosen the lug nuts on the wheels associated with the leaf springs you’ll be replacing, but do not remove them yet.

Step 2: Lift and Secure the Vehicle

Using your hydraulic jack, carefully lift the frame of the vehicle or trailer high enough so that the wheel associated with the leaf spring you are replacing is completely off the ground. Place sturdy jack stands under the frame, as close to the spring hangers as possible, ensuring they are on a solid, load-bearing part of the frame. Slowly lower the jack until the vehicle rests securely on the jack stands. Remove the wheels.

Step 3: Remove the Old Leaf Springs

This is often the most challenging part due to rust and seized bolts.

Apply Penetrating Oil: Spray all spring eye bolts, shackle bolts, and U-bolts with penetrating oil. Let it soak for at least 15-20 minutes, or longer if they appear heavily rusted.
Remove U-Bolts: Use your socket or impact wrench to loosen and remove the nuts securing the U-bolts that clamp the leaf spring to the axle. Keep these bolts and nuts, as they may be reused if in good condition, though new hardware is often recommended and included with Flexiride springs. Once the nuts are off, remove the U-bolts and the lower spring seat or plate.
Remove Shackle Bolts: The rear of the leaf spring is typically attached to a shackle. Remove the nut from the shackle bolt that connects the spring to the shackle, and then the nut from the shackle bolt that connects the shackle to the frame. You may need to use a hammer and punch to drive these bolts out.
Remove Front Spring Eye Bolt: The front of the leaf spring is usually attached directly to a hanger on the frame. Remove the nut from this bolt. Again, a hammer and punch might be necessary to drive the bolt out.
Lower the Spring: Once all bolts are removed, the old leaf spring should be free. Carefully remove it from its position.

Step 4: Clean the Mounting Areas

Before installing the new Flexiride springs, take this opportunity to clean any rust, dirt, or debris from the spring hangers, shackle mounts, and axle pad using a wire brush. This ensures proper fitment and prevents premature wear on the new components.

Address: 3790 Davidson Rd, Inverary, ON K0H 1X0
Phone: Local: 613-653-7839 Toll Free: 1 833-653-7839 Fax: 613-353-7660

Step 5: Install the New Flexiride Leaf Springs

Installation is essentially the reverse of removal, but with careful attention to detail.

Position the New Spring: Lift the new Flexiride leaf spring into place. Start by aligning the front eye of the spring with the front hanger on the frame. Insert the new spring eye bolt (and bushing if supplied separately) through the hanger and the spring eye. Do not tighten the nut fully yet; just hand-tighten it enough to hold the spring in place.
Attach to the Shackle: If reusing your old shackle, attach the rear eye of the Flexiride spring to the shackle, inserting the bolt and hand-tightening the nut. Then, attach the shackle to the frame hanger, inserting that bolt and hand-tightening. If new shackles are provided or recommended, install them according to the manufacturer’s instructions.
Align with Axle: Carefully lower the axle (using your jack if necessary) until the center pin of the Flexiride spring aligns with the hole in the axle seat. This alignment is crucial for proper spring operation and preventing axle wrap.
Install New U-Bolts: Place the upper spring seat (if applicable) and then the new U-bolts over the spring and around the axle. Install the lower spring plate and new nuts onto the U-bolts. Tighten these nuts evenly in a cross-pattern, but do not fully torque them yet.

Step 6: Final Tightening and Torque Specifications

This step is critical for safety and performance.

Lower the Vehicle: Carefully raise the vehicle with the jack, remove the jack stands, and slowly lower the vehicle until its full weight is resting on the new springs, but the wheels are still off the ground. This “weight-on-wheels” position allows the suspension components to settle into their natural operating position before final tightening.
Torque the Bolts: Now, using your torque wrench, tighten all nuts and bolts to the manufacturer’s specified torque settings. This includes the front spring eye bolt, the shackle bolts, and especially the U-bolt nuts. U-bolts are typically tightened in stages and re-checked after a short period of use. Refer to your Flexiride instructions or vehicle service manual for precise torque values.
Reinstall Wheels: Mount the wheels back onto the hubs, hand-tighten the lug nuts, then lower the vehicle completely to the ground. Torque the lug nuts to the manufacturer’s specifications in a star pattern.

Step 7: Post-Installation Checks and Testing

After completing the installation, perform a thorough inspection:

Double-check all bolts for proper torque.
Ensure there is no interference between the new springs and any other vehicle components.
Take the vehicle for a short, cautious test drive. Listen for any unusual noises, feel for any abnormal handling characteristics, and observe the ride quality.
After the first 50-100 kilometers (30-60 miles), it is highly recommended to re-check the torque on all U-bolts, as they can sometimes settle and loosen slightly.

Conclusion

Replacing worn-out leaf springs with new Flexiride units is a significant upgrade that can dramatically improve your vehicle’s performance, safety, and comfort. While it’s a demanding task, following these steps carefully will ensure a successful installation. Remember that proper tools, adherence to safety protocols, and correct torque specifications are key to a lasting and reliable repair. Enjoy the enhanced ride and durability your new Flexiride springs provide!

Address: 3790 Davidson Rd, Inverary, ON K0H 1X0
Phone: Local: 613-653-7839 Toll Free: 1 833-653-7839 Fax: 613-353-7660

Step-by-Step Guide for Replacing Worn Out Leaf Springs with Flexiride