wheelbearing中文

Enough wear and tear on your drive axle can eventually affect the way your vehicle steers. If you notice that your vehicle no longer handles as responsively when turning the wheel (especially if it’s more prominent on one side, since bearings on both sides of a vehicle rarely wear out at the same time), have the bearings in your car checked by a professional mechanic ASAP.

Badwheel bearing symptoms

Most of the time, wheel bearings fail when the seal protecting them breaks. This allows heat, water, dust, and other debris to enter the hub assembly, where it can contaminate the lubricant that keeps your bearings moving smoothly while you drive. This contamination can eventually cause the bearings to rust, which prevents them from moving smoothly against each other and creates friction within your hub assembly—putting strain on your driveshaft and ultimately your transmission.

A bad wheel bearing can cause a tire/wheel to move or glide unevenly or sluggishly. It can also cause your brakes to drag, pulling your vehicle to one side when you try to stop.

The average cost to replace a sealed wheel hub bearing is $350 per wheel. However, depending on the make and model, shop labor rate, the cost of the bearing itself and any additional damage, the total could exceed $1,000.

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Wheel bearings just aren’t meant to last forever. In general, it’s a good idea to replace them every 85,000–100,000 miles (roughly 136,000–160,000 kms). Of course, the lifespan of your wheel bearings also depends on the quality of the products you buy—our high-quality aftermarket replacement wheel bearings are designed to last significantly longer than the cheapest options you’ll find online.

When wheel bearings wear down and stop moving smoothly, they may produce a clunking or banging sound. Often, this is only noticeable when a bearing has experienced significant wear and tear—although it can also be apparent when travelling over surfaces with uneven patches.

Wheel bearing noisewhen driving

We know all about wheel bearings, why they fail, and when they need to be replaced. Read on to learn about 8 common signs of wheel bearing problems so you can recognize a failing bearing in your own vehicle and order a high-quality replacement for it before it leads to other problems.

You might think this is just an annoying light on the dash you can ignore while driving, but we strongly recommend against doing so (or driving while any of your dashboard’s warning lights are on). The ABS sensor determines when your anti-lock braking system engages—and if it detects significantly more friction on one side of your vehicle than the other, it may turn ABS on when you’re not expecting it, creating a serious safety hazard.

NOTE: Whether you DIY or your mechanic replaces the bearing, always install a new axle hub nut. Most hub nuts are prevailing torque fasteners, used on critical components (like securing axle shafts to hub bearings) where a loose nut could lead to disastrous consequences.

How to tell whichwheel bearingis bad while driving

When bearings wear out or lose their lubrication, they can create a grinding noise. This noise is normally more noticeable when turning your vehicle to the side with the worn out bearing on it. If you hear grinding, loud humming, or rumbling coming from your vehicle during turns or while accelerating, there’s a good chance your bearings are due for replacement.

Even in cars without ABS, driving with worn-out bearings can cause major handling problems. Enough friction on one side of the car can result in your vehicle pulling to one side. This can make turning in one direction much more difficult than the other, reducing your ability to manoeuvre in potentially dangerous situations. It can also cause you to drift to one side while driving in a straight line unless you’re constantly applying pressure in the opposite direction—which can cause you to become fatigued more quickly, making longer drives less comfortable and much less safe.

But sealed wheel bearings are non-serviceable and should never be repaired, only replaced. Even if a pro suggests repairing a bearing, don’t let them. Trying to reuse a damaged wheel bearing can result in an accident and severe injury.

Unlike unbalanced tires, shaking caused by a bad wheel bearing should be obvious from the side of the car where the bearing is failing.

Read on to learn the most common bad wheel bearing symptoms, based on my experience (50 years in the industry) and that of Joe Simes, a National Institute for Automotive Service Excellence (ASE) certified and Toyota master technician. But first, a little background.

On modern front- and four-wheel drive cars, wheel bearings are a set of permanently sealed, precisely machined steel ball or straight roller bearings. The balls, or rollers, are encased in a “cage” that supports the bearings, allowing them to rotate freely.

You can service or replace tapered wheel bearings yourself. Never reuse any wheel bearing that’s loose, worn, noisy or shows any signs of wear.

Bad rearwheel bearing symptoms

The cage and rollers are held together inside a hardened metal ring called a “race.” The seal keeps grease in and damaging water and debris out. Wheel bearings are installed inside, and secured to, the suspension, either by press fit, bolts or a snap-ring. Once mounted, the wheel bearing rides on the axle shaft, allowing the tire/wheel to spin effortlessly.

Depending on the vehicle, you can save hundreds in labor replacing wheel bearings yourself. Most auto parts stores will lend you the specialty tools and equipment needed to replace a wheel bearing.

On many vehicles, the ABS sensor is built into the wheel bearing, or it’s externally mounted adjacent to the spinning part of the bearing where the sensor measures vehicle speed. Damaged from a wobbly wheel bearing, the sensor will send erratic readings to the vehicle’s computer, illuminating the ABS light.

You may not think about the wheel bearings in your car often—but when there’s a problem with them, it’ll cause issues that make driving noticeably harder. Of course, figuring out exactly what issues come from worn-out wheel bearings can be difficult for people without a lot of mechanical experience. That’s why we’re here to help.

One of the first signs of worn out wheel bearings you should look out for is what feels like a reduction in your car’s power. Worn out bearings often create significant wobbling in vehicles, which can make your car unsteady above certain speeds and create friction that prevents them from accelerating properly.

In many newer cars and trucks, wheel hub assemblies also contain the sensor for the anti-lock braking system. When the bearings inside the hub assembly fail, the ABS sensor on your dashboard may turn on.

How to tell whichwheel bearingis bad in thefront

If you suspect a problem with your wheel bearings, one good rule of thumb is to take a closer look at the rubber on your vehicle. If the tires are balding on one side and have plenty of tread on the other, a worn-out bearing is likely the culprit.

When the wheel bearings on one side of your car begin to fail, they’ll cause more friction in the hub assembly of the wheels they’re attached to. As a result, that wheel won’t turn as fast as the one on the other side of your vehicle—which means the tires won’t wear evenly on both sides.

Friction from a failing wheel bearing produces heat. After driving, without touching the tires or wheels, carefully walk around your vehicle and use a non-touch thermometer to measure if one is hotter than the others.

Simply stated, wheel bearings allow cars and trucks to run smoother and more efficiently by reducing friction and supporting vehicle weight. When they start to fail, you can usually tell.

Absolutely not. It’s crucial to get bad wheel bearings diagnosed and replaced ASAP. If not, you could lose a wheel or get in an accident.

That wobbling we just mentioned will probably first be noticeable in your steering wheel. You might not feel as though it’s much of an issue at first—but if you don’t replace the bearings soon, the friction will increase and can cause your entire car or truck to vibrate. In these cases, it’s best to replace the bearing ASAP to prevent unnecessary friction on your driveshaft and the rest of your transmission.

Badwheel bearing noise

You’ll hear clicking, cracking, grinding, snapping, or whining noises coming from your wheels or tires. They’ll increase when accelerating or turning.

Joe Simes is an ASE and Toyota master technician. After 20 years in the industry, Simes recently became a Pennsylvania Department of Education certified automotive technology instructor at North Montco Technical Career Center in Lansdale, Pennsylvania.

According to Simes, a failing wheel bearing will likely produce a soft, faint vibration that’s felt before it’s heard. There may also be a vague rhythmic humming or droning sound that increases over time and with speed.

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