How to Replace an ATV or UTV Axle

What Makes the Axle So Critical for Off-Road Performance

Axles are essential for getting power from your engine to your wheels, so when they do their job, it’s easy to not notice. They also play a key role in handling rough terrain, allowing you to take on the gnarliest rides.

Whether you have axles that are wearing out, broken, or it’s just time to upgrade to heavy-duty aftermarket options, replacing your axles can be a DIY job—even if it seems intimidating. All you need is the right tools, high-quality replacements, and the ability to follow a few steps. It’s a task worth taking on, and after your first ride with new axles, we know you’ll agree. Let’s dive in!

When Should You Replace Your ATV or UTV Axle?

Knowing how to replace your axles doesn’t do much if you don’t know when you should. Here are a few common signs that an axle may be wearing down or breaking and should be replaced: 

• Clicking noises during turns
• Damage to CV boots or joints
• Loss of power to one or multiple wheels
• Poor handling
• Vibrations when braking or accelerating
• Visible grease

If you are concerned your axles are worn or broken but aren’t sure, check out our guide that will walk you through how to tell if your UTV or ATV axle is broken.

Tools and Parts You’ll Need

Before taking your rig apart, make sure you have all the tools and replacement parts you’ll need. The tools should include: 

• A sturdy jack and wheel blocks
• Socket wrenches
• Torque wrench
• Needle-nose pliers
• Rubber mallet
• Work gloves
• Safety glasses 

Obviously, you’ll need to have your replacement axle on hand, but you may also need cotter pins, axle nut, new boots, and grease, depending on what is included with your replacement axle.

Preparation Steps Before You Start

Once you have your parts and tools organized, prep your work space. It should be on a flat, level surface where the vehicle and jack can be secured. Before you begin, disconnect the battery. Jack up your ATV or UTV, and remove the appropriate wheel and tire, inspecting the hub and surrounding components for signs of damage. Now, let’s replace that axle!

Step-by-Step Guide to Replacing Your Axle

Step 1: Remove the Axle Nut and Wheel Hub Assembly

Once the wheel and tire are off, remove the brake caliper from the rotor, then use your needle nose pliers to remove the cotter pin. Once that is done, you can remove the axle nut, washers, and the wheel hub assembly.

Step 2: Disconnect the Suspension Components

If your rig has A-arms, detach them from the spindle by removing the spindle bolts. With shocks, disconnect the sway bar link and knuckle so you can push them up and out of the way—you may want to use a strap to hold them out of your working space. No matter your rig, disconnecting the suspension components is essential for accessing the axle.

Step 3: Pull the Old Axle Out From the Differential or Transmission

Pulling out the old axle is relatively simple—just give it a few good yanks. Some axles may require you to plunge the axle in before pulling it out.

Step 4: Insert the New Axle

Set the new axle into the differential, setting the CV splines into the differential splines to seat it. Make sure it is fully engaged and clicks into place. This is a good time to use your rubber mallet to give the axle a few solid strikes once it is set into the differential and clicks into place.

Step 5: Reassemble Components and Torque Everything to Spec

Reattach your suspension components and ensure all connections are torqued to the specifications in your owner’s manual. This is vital to avoid excessive wear and tear, damage, and ensure a smooth ride.

Common Mistakes to Avoid When Installing an Axle

As with any work of this kind, mistakes can happen when installing an axle. Luckily, knowing the problems can keep you from making them. Some of the most common mistakes that occur during axle installation are:

• Forgetting to torque properly—this can cause issues with your suspension or wheel
• Reusing your old cotter pins or axle nuts—these are more likely to fail than new replacements
• Losing or breaking the inner spline C-clip—small as they are, a broken or missing C-clip means your axle is going to fall out of your transmission
• Damaging the axle boot during installation—it can be easy to cut the axle boot if you let the axle dangle after installing it in the transmission, resulting in leaking grease. If you ride on a bad boot for too long, you can damage the CV joint and lead to popping sounds, vibrations, and clunking when accelerating or decelerating

What to Check After Installation

When you’ve finished installing your axle and checked your work, reassemble your ATV or UTV and lower it off the jack. Take a slow test drive, listening for popping noises and ensuring that there is no vibration. After about 10 or 15 minutes, re-torque your hardware to ensure that it still meets specifications. Once that is done, you’re all set to ride! Just keep an eye out for out-of-place noises or grease leaks during the next handful of rides.

Now You’re Ready for Anything

Learning how to replace an axle on your ATV or UTV is one of the most immediate ways that you can improve your rig’s performance. With the correct tools, instructions, and high-quality parts, you can safely and successfully take on this project at home. Speaking of high quality, if you are looking for the best of the best in durable, high-performance, and heavy-duty ATV and UTV axles, all you need to do is check out SuperATV’s selection. 

Questions about installing axles or our selection? Reach out or drop a comment below! We always love hearing from our fellow riders.