Ever had your truck’s tailgate or SUV’s liftgate slowly sag, or worse, come crashing down on you? It’s not just annoying; it’s a safety hazard, especially when loading gear for your next off-road adventure or camping trip. A failing tailgate or liftgate can be a real pain, making simple tasks feel like a wrestling match.
At FatBoysOffroad, we understand the frustration and danger of failing supports. That’s why we’re here to show you exactly how to replace tailgate struts yourself, saving you money and ensuring your rig is ready for anything. You don’t need to be a professional mechanic to tackle this common issue.
This comprehensive guide will walk you through diagnosing weak gas springs, gathering the right tools, performing the swap safely, and even offer some pro tips to keep your tailgate operating smoothly for years to come. Get ready to reclaim the effortless lift and secure hold your vehicle once had.
Your tailgate deserves to stay open without you holding it. Let’s get started.
Is Your Tailgate Failing? Diagnosing Weak Liftgate Supports
Before you dive into replacement, it’s crucial to confirm that your tailgate struts, also known as gas springs or liftgate shocks, are indeed the culprits. Recognizing the symptoms early can prevent accidents and further damage.
Common Signs of Worn-Out Struts
- Slow, uncontrolled descent: The most obvious sign. Your tailgate or liftgate no longer holds itself open firmly.
- Dropping unexpectedly: This is dangerous. It might open partway then suddenly fall, posing a risk to anyone underneath.
- Difficulty lifting: If you have to exert excessive force to open the tailgate, the gas pressure in the struts is likely gone.
- Squeaking or grinding noises: While less common for struts, sometimes worn mounting points can cause these sounds.
- Visible leaks: Check for oily residue around the strut body or piston rod. This indicates a seal failure and loss of gas.
- Uneven lifting: If your liftgate has two struts and one is failing, it might lift crookedly.
Testing your struts is simple. With the tailgate open, try to push it down gently. If it offers little resistance or drops quickly, it’s time for a replacement.
Gathering Your Gear: Tools and Replacement Tailgate Struts
Having the right tools and parts before you start makes the job smoother and safer. Don’t rush into it without being prepared.
Essential Tools You’ll Need
Most tailgate strut replacements are straightforward and require only basic hand tools. Here’s what you should have:
- Flathead screwdriver: Often used to pry open the retaining clips on the strut ends.
- Small pry tool or trim removal tool: Can be gentler than a screwdriver for clips.
- Work gloves: Protect your hands from grime and sharp edges.
- Safety glasses: Always protect your eyes, especially when working with spring-loaded components.
- Strong prop rod or broom handle: Absolutely critical for safely holding the tailgate open during the replacement process. Never rely on one old strut to hold the weight.
- Friend or helper: An extra set of hands makes this job much safer, especially for heavy liftgates.
Choosing the Right Replacement Struts
Selecting the correct replacement parts is vital for proper function and safety. Not all struts are created equal, and specific vehicles require specific types.
- Vehicle-specific fitment: Always purchase struts designed for your exact make, model, and year. The length, mounting points, and gas pressure are all critical.
- OEM vs. Aftermarket: Original Equipment Manufacturer (OEM) parts guarantee an exact fit and performance. Aftermarket options can be more budget-friendly but ensure they meet or exceed OEM specifications.
- Quality matters: For off-roaders and those who rely on their vehicles, investing in a reputable brand pays off. Cheap struts might fail prematurely.
- Buy in pairs: Even if only one strut seems bad, it’s best to replace both at the same time. The other is likely close to failing, and replacing them together ensures even lift and longevity.
You can find replacement struts at auto parts stores, dealerships, or online retailers. Make sure to double-check the part numbers against your vehicle’s specifications.
Preparation is Key: Safety First Before You Begin
Safety should be your top priority. A falling tailgate can cause serious injury. Take a few moments to set up properly.
Secure the Tailgate
Before you even think about touching a strut, you must securely prop open the tailgate or liftgate. This is non-negotiable.
- Open the tailgate fully.
- Use a sturdy prop rod, a thick wooden dowel, or a broom handle. Position it securely from the ground or bumper to the tailgate’s edge.
- If you have a helper, have them hold the tailgate firmly.
- Test the prop’s stability by gently trying to close the tailgate. It should not move.
This step prevents the tailgate from falling once you remove the old gas springs. Remember, even a seemingly “working” strut might give out under pressure.
Step-by-Step: How to Replace Tailgate Struts Safely
Now that you’re prepared, let’s get into the nitty-gritty of the replacement process. We’ll walk through it one strut at a time.
Removing the Old Gas Springs
Start with one strut first, leaving the other (or your prop) to support the tailgate.
- Locate the retaining clips: Most struts attach with ball-and-socket fittings secured by a small metal clip. These clips are usually at both ends of the strut.
- Pry open the clip: Carefully insert a flathead screwdriver or small pry tool under the retaining clip. Gently pry it outwards, away from the ball joint. You don’t need to remove the clip completely, just enough to release its grip.
- Detach the strut: Once the clip is disengaged, firmly pull the strut end off the ball joint. It might take a little force.
- Repeat for the other end: Once one end is free, move to the other end of the strut and repeat the process to detach it.
- Remove the old strut: Carefully remove the old strut. Be mindful of its length and any potential spring-back if it still has residual pressure.
Take note of how the old strut was oriented. Most have a specific direction – typically, the larger cylinder body should be at the top when the tailgate is open, allowing the rod to extend downwards. This helps with proper lubrication and strut longevity.
Installing Your New Liftgate Shocks
Installing the new struts is often easier than removal. Again, work one strut at a time.
- Orient the new strut: Ensure the new strut is oriented correctly (cylinder body usually up, rod down).
- Attach one end: Align one end of the new strut with its corresponding ball joint. Push it firmly onto the ball until you hear or feel a click. The retaining clip should snap back into place, securing it. If not, you may need to gently push the clip back into position.
- Attach the second end: This might be the trickiest part. You may need to compress the new strut slightly to align the second end with its ball joint. This is where a helper comes in handy. Have them gently lift or lower the tailgate a tiny bit to help with alignment.
- Secure the second end: Once aligned, push the second end firmly onto the ball joint until it clicks into place. Confirm the retaining clip is secure.
- Repeat for the second strut: If your vehicle uses two struts, repeat the entire process for the second side. Remember to always keep the tailgate safely propped or held until both new struts are fully installed.
- Test the operation: Once both new struts are in, remove your prop rod and slowly close and open the tailgate several times. It should lift smoothly and hold securely in the open position.
Congratulations! You’ve just completed the process for how to replace tailgate struts on your vehicle.
Post-Installation Checks and Pro Tips for Longevity
After the installation, a few checks and ongoing maintenance tips can ensure your new struts last.
Initial Checks
- Smooth operation: The tailgate should open and close with consistent resistance. No jerky movements or sudden drops.
- Full extension: Ensure the tailgate opens to its full intended height.
- Secure mounts: Double-check that all strut ends are firmly seated on their ball joints and that the retaining clips are fully engaged.
Pro Tips for Extended Life
- Keep them clean: Dirt and grime can damage the seals on the strut rod. Periodically wipe down the rods with a clean, damp cloth.
- Avoid overloading: While struts are designed to support the tailgate, don’t use them to prop up additional heavy items for extended periods.
- Winter considerations: In very cold weather, gas springs can be stiffer initially. Give them a moment to warm up before forcing them.
- Regular inspection: Include a quick check of your tailgate struts in your routine maintenance. Look for leaks, bends, or loose mounting points.
By taking these simple steps, you can significantly extend the lifespan of your new liftgate supports.
When to Call in the Pros: Knowing Your Limits
While replacing tailgate struts is a common DIY task, there are times when it’s best to seek professional help. Recognizing these situations is a sign of a smart DIYer.
- Stripped bolts or rusted mounts: If the mounting points are severely rusted, damaged, or you strip a bolt trying to remove it, professional intervention might be needed.
- Complex wiring: Some modern liftgates have integrated wiring for lights, cameras, or power lift assist. If you suspect these are involved, or if the struts are integrated into a power lift system, it’s often best left to a specialist.
- Unusual resistance or alignment issues: If the new struts don’t seem to fit correctly, or if the tailgate still doesn’t operate smoothly after installation, there might be an underlying issue that requires a trained eye.
- Lack of confidence: If you feel uncomfortable or unsafe at any point during the process, stop and consider taking your vehicle to a trusted mechanic. Your safety is paramount.
Don’t hesitate to reach out to a certified technician if you encounter any unexpected difficulties. It’s better to be safe than sorry, especially when dealing with heavy components like tailgates.
Frequently Asked Questions About Tailgate Strut Replacement
How long do tailgate struts typically last?
On average, tailgate struts or liftgate supports last anywhere from 5 to 10 years, depending on usage, climate, and quality of the original parts. Heavy use, especially in off-road conditions, can shorten their lifespan.
Can I drive with a broken tailgate strut?
Yes, you can drive with a broken tailgate strut, but it’s not recommended to leave it unaddressed. The main danger is the tailgate falling unexpectedly when open, which can cause injury or damage. It also makes loading and unloading much more difficult.
Are tailgate struts interchangeable between different vehicles?
No, tailgate struts are generally not interchangeable. Each vehicle model has specific requirements for strut length, mounting type, and gas pressure. Using the wrong strut can lead to improper fitment, poor performance, or even damage to the tailgate or mounting points.
Do I need special tools to compress the new struts?
Typically, no special tools are needed to compress new struts during installation. They are designed to be compressed by hand or by the weight of the tailgate itself. However, having a helper to gently manipulate the tailgate for alignment can make the job much easier.
What if my tailgate still sags after replacing the struts?
If your tailgate still sags after replacing the struts, double-check that you installed the correct struts for your vehicle and that they are securely mounted. If the problem persists, it might indicate an issue with the tailgate hinges or other structural components that may need inspection by a professional.
Final Thoughts: Keep Your Rig Ready for Adventure
Replacing your tailgate struts is a straightforward and rewarding DIY project that significantly improves the safety and functionality of your vehicle. No more dodging a falling liftgate or struggling to keep it open while you load up for the trail or campsite.
By following this guide, you’ve not only saved money but also gained valuable experience and confidence in maintaining your rig. At FatBoysOffroad, we’re all about empowering you to tackle these jobs yourself.
Keep those struts in top condition, and your tailgate will be ready for every adventure you throw at it. Stay safe and stay comfortable out there!
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