Few things are more frustrating than hearing a clicking sound when you turn the steering wheel, but few things are as serious as the problem behind that noise. Your car’s CV axles play a huge role in its ability to accelerate and drive normally, so ignoring a potential problem can have disastrous results.
If you’re unsure about what we’re talking about or have no idea where to even start, we’re here to help. The Drive’s editors have diagnosed and replaced CV axles on cars, both new and old, and are here to help you get started on the right path.
Most people will take their cars into the shop when it’s time for a new CV axle, but it’s a job that you can absolutely do yourself with some time, patience, and plenty of elbow grease. Don’t be intimidated, but do spend the time to research your own vehicle to make sure you’re comfortable with the work.
Let’s get started.
You may already be familiar with engines and transmissions, or you’ve read a few of The Drive’s excellent explainers on the topic. For those who aren’t and haven’t—what’s wrong with you, go now—the engine generates power and the transmission transmits it to the wheels.
What you might not have thought much about is that the wheels of a vehicle are in constant motion, and not just as they roll, which means that the transmission needs a way to transfer its go-power to the wheels in a flexible and movable way.
That’s where the CV axles come into play. CV axles, or constant velocity axles, come into play. They allow the transmission to drive a car’s wheels and open up a range of motion with bearings. The CV axle is composed of those bearings and rubber boots that can wear out over time.
Those cute little rubber boots that form the joints in a CV axle can become brittle and crack over time. When this happens, the grease and lubricant that is packed inside can leak out, or dirt and debris from the road can creep their way in.
You may notice a clicking sound when turning the wheel or accelerating and feel a vibration as the vehicle is in motion. You may also notice grease on the inside of your wheels or tires as the lubricant leaks out from a damaged CV boot.
You absolutely can replace your CV axle at home, but you’ll need to be at least remotely comfortable using a jack, jack stands, and power tools. Assuming you have most of the equipment already set up in your garage at home, the cost to replace your CV axle will be quite reasonable. Most parts stores and online outlets will sell you a new one for less than $100.
Estimated Time Needed: 1-2 hours, depending on your skill and comfort level
Skill Level: Upper-Level Beginner
Vehicle System: Drivetrain/suspension
Working on your car can be dangerous and messy, so here’s exactly what you’ll need to ensure you don’t die, get maimed, or lose a finger and that you keep your jeans, shirt, and skin spotless—hopefully.
An impact wrench isn’t required for this job, but it’ll make your life a whole lot easier. It can also make this job safer, since you won’t have to worry as much about torquing the axle nut.
Organizing your tools and gear so everything is easily reachable will save precious minutes waiting for your handy-dandy child or four-legged helper to bring you the sandpaper or blowtorch. (You won't need a blowtorch for this job. Please don’t have your kid hand you a blowtorch—Ed.)
You’ll also need a flat workspace, such as a garage floor, driveway, or street parking. Check your local laws to make sure you’re not violating any codes when using the street because we aren’t getting your ride out of the clink.
The process below is a general guide on the steps to replace a CV axle. Your vehicle may be slightly or drastically different, depending on the make and model. Refer to your vehicle’s service manual to see the exact steps that you’ll need to follow.
You’ll also notice that we recommend using an impact wrench to remove the axle nut, but note that doing the job by hand is safer when done while the car is on the ground. If you’re following the by-hand route, step five should be performed before jacking up the car.
Let’s do this!
As much as The Drive loves to put the "you" in do-it-yourself, we know that not everyone has the proper tools, a safe workspace, the spare time, or the confidence to tackle major automotive repairs. Sometimes, you just need quality repair work performed by professionals you can trust like our partners, the certified mechanics at Goodyear Tire & Service.
Here are The Drive’s pro tips.
You’ve got questions, The Drive has answers!
A: No. Do not ignore a bad CV axle. The vibrations you’re feeling and noise you’re hearing are a warning that it’s time for maintenance. If your axle fails while you’re driving, you could lose control of your car.
A: CV axles are usually covered by the manufacturer’s powertrain warranty, which should have you covered for at least four to five years and 50,000 to 60,000 miles. As for whether or not the axle makes it past the warranty period, there are many factors that can impact its lifespan. Driving over rough terrain where there are rocks and debris can shorten the life of a CV axle, because there are more opportunities to damage the rubber boot that protects the moving parts. The same goes for driving in snowy or icy conditions, where salt and sand can also damage the rubber. In some cases, the rubber just dries out and cracks, which has the same effect.
A: If you hear a clicking or grinding sound while turning, there’s a good chance your CV axle is starting to go. The noise may also be present while accelerating, but it’s most noticeable when turning the steering wheel.
A: Yes, since it’s connected directly to the transmission, a failing CV axle can cause damage. Excessive movement from a damaged axle can wear components inside the transmission more quickly than they would normally.
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