AUTONET TV

Differential Service at Auto Authority LLC: Viva la Difference

Every vehicle on Wisconsin roads has a differential, and it is important to the proper operation of the vehicle.  But most Oshkosh residents don't have a clue what it is.

The differential compensates for differing wheel speeds. For example, when you turn, the inside tire on the turn travels a much shorter distance than the outside wheel. So the inside wheel of the vehicle must move at a slower speed than the outside wheel. Without a differential, the wheels would hop and scrape while turning.

Have you ever seen the large bulge in the middle of the rear axle of a truck? That's the differential. In a rear-wheel drive vehicle, the differential is located on the back axle. Four-wheel drive vehicles and SUV's have differentials on both the front and the rear axle.

You might expect that the differential is located on the front axle of a front-wheel drive vehicle. You'd be right. But the differential is called a transaxle on a front-wheel drive vehicle because its location allows it to be combined with the transmission.

In an all-wheel drive vehicle, an additional differential or transfer case is located between the front and rear axles. Differentials are strong: They have to be because of the job they do. But those tough parts need proper lubrication. You don't want your differential to seize up. That results in damage to your vehicle.

So you need to have your vehicle differential serviced regularly. It's not a complicated job. At Auto Authority LLC in Oshkosh, we've been servicing differentials for years. The used lubricating fluid is simply drained and then replaced. Some vehicles require specific additives in the differential fluid; your Oshkosh service center will ensure you are getting what your vehicle needs.

The intervals in time or mileage for servicing your differential vary greatly from vehicle to vehicle. Check with your owner's manual or Auto Authority LLC service advisor to find out how often your vehicle differential needs to be serviced.

Auto Authority LLC
804 Witzel Ave
Oshkosh, Wisconsin 54902
920-231-1016
http://www.autoauthorityoshkosh.com

Upgrade Shocks for Better Handling in Oshkosh

Many Oshkosh drivers probably don't think of their shock absorbers as an important safety system; but that's just what shocks and struts are. They're all about ride control – keeping your vehicle tires in contact with the road and managing body motion.

Every time you hit a bump or pothole on a Oshkosh road, your tire wants to bounce up. The bigger the bump, the higher the bounce. Your shocks or struts push down on the tire to maintain the traction you need to start, stop and turn.

If you've ever ridden in a vehicle with bad shocks, you know how it wallows on corners. The front end dives when you hit the brakes and the rear end squats when you accelerate. It's not only uncomfortable, it is difficult to handle.

You may have heard vehicles described as having “flat cornering." That means that when you take a corner, the body doesn't roll very much. When shocks start to get worn, your vehicle will roll more on corners. The weight of your vehicle's body shifts and tosses your vehicle to the outside of the turn, making it harder to control.

With good shocks, you can turn corners with confidence. When the shocks are bad, the body rolls too much and you need to slow down to maintain the same level of control. When you have to combine brake dive with body roll, you can quickly end up with an unsafe handling situation.

Shocks can break or start to leak, but they usually just wear out. After all, your vehicle shocks will move up and down over 75 million times in 50,000 miles/80,000 km. If you replace shocks at Auto Authority LLC in Oshkosh, it will restore your vehicle's original ride control and quality. You can even upgrade shocks and struts if you want better handling or towing capacity on Wisconsin roads.

Shocks are an important safety system: don't wait until they are completely shot, perhaps risking your safety or damaging other suspension components. At Auto Authority LLC we can help you with quality shocks and struts as advised in your owner's manual, usually at around 50,000 miles/80,000 km, for a comfortable, safe handling ride in Oshkosh.

Give us a call.

Auto Authority LLC
804 Witzel Ave
Oshkosh, Wisconsin 54902
920-231-1016
http://www.autoauthorityoshkosh.com

Everything You Ever Wanted to Know About Wheel Bearings

Why are wheel bearings for Oshkosh vehicles important? It's simple: your wheel bearings keep the wheels on your vehicle. In today's Auto Authority LLC post, we'll discuss more about wheel bearings and how you can make sure they can do their very job while you drive around Oshkosh, Wisconsin.

Wheel bearings are pretty simple parts. They're made of high quality steel and are engineered to last 100,000 miles (160,000)  or more if properly cared for. The bearings do two jobs: First, they allow the wheel to freely rotate with as little friction as possible. Second, they support the weight of the vehicle. For example, if your car weighs 3,600 pounds (1600 kilogram), each wheel has to support approximately 900 pounds (400 kilograms). That's a lot of heavy lifting over those long distances.

Even though wheel bearings are pretty straightforward, they need to be in near perfect condition to do their job for Oshkosh vehicles. The bearings are packed with heavy grease to lubricate and protect them. A seal keeps the grease in and water and dirt out. It's when the seal starts to leak that problems begin. The grease can become contaminated, causing the wheel bearings to overheat and ultimately fail.

The first sign that your wheel bearings are in trouble is an unusual noise coming from a wheel. It could be a chirping, growling, rumbling or a cyclic sound. The noise could get louder or even disappear at certain speeds. Your technician at Auto Authority LLC can inspect for bearing wear by lifting the vehicle and checking for play in the wheel.

Now some wheel bearing assemblies are factory sealed. That means that they cannot be serviced – they can only be replaced. Those that aren't sealed can be serviced on schedule at Auto Authority LLC. The bearings are removed, cleaned and inspected. If the bearings are still good, they're re-installed – if not, they're replaced. They are then packed in grease and a new seal is installed.

If your vehicle has a factory sealed wheel bearing assembly, the entire assembly needs to be replaced when trouble arises. Unfortunately, the parts are pretty costly – but they usually last about 150,000 miles (240,000 kilometers) as long as the seals hold up.

Now, even a good seal cannot keep out water that's exerting pressure on the seal. So if you've driven through hub-deep water, your bearings should be cleaned and repacked if they're serviceable. If you have factory sealed bearings, you just need to watch for signs of premature failure. If your wheel bearings can be serviced, your manufacturer's owner's manual will recommend an interval, usually around 30,000 miles (50,000 kilometers).

If you have any sort of trailer, don't forget its wheel bearings. They probably need to be serviced even more frequently. This is especially true for boat trailers that are used to launch the boat by backing it into the water. These should be serviced every year, usually at the end of the season so that the bearings don't have the opportunity to rust all winter.

So what happens to Oshkosh vehicles if wheel bearings fail? Well, the wheel can literally fall off the vehicle. I don't need to tell you how that could be. So check with your service advisor at Auto Authority LLC and see if your vehicle's wheel bearings can be serviced and when it's recommended. Listen for warning signs. If you've been fording streams or puddle surfing after rainstorms, be especially vigilant.

Visit the automotive professionals at Auto Authority LLC for a wheel bearing inspection. 

Auto Authority LLC
804 Witzel Ave
Oshkosh, Wisconsin 54902
920-231-1016
http://www.autoauthorityoshkosh.com

The Auto Authority LLC Guide to Tire Specs

You know you need new tires, but you're not sure what type. You look at a tire to get the size: 225, 50, R, 16, 92, H. All the way to the Oshkosh service center you keep repeating it over and over. You even say it over in your mind while waiting in line. Then you get to the counter and the manager asks what size you need. Then your mind goes blank.

Tire size can be confusing for many Oshkosh drivers. There's so much on the side of the tire, and it's hard to keep straight.

Even though there's a lot on a tire - if you know what it all means, it's actually more helpful than confusing for Oshkosh tire shoppers. Let's start with the size number.

For example, let's say a tire reads: 225 50 R 16 92 H. The 225 part is the width of the tire in millimeters - the width between the sidewalls of an inflated tire with no load. The 50 is the aspect ratio - the ratio of the sidewall height to the tread width. Off-road tires will have a higher number and high performance tires will have a lower number.

The R signifies it's a radial tire. And 16 is the rim or wheel size in inches.

The 92 is the load rating index - it's the load carrying capacity of a tire. The higher the number, the more it can safely carry. Your empty vehicle can be safe with a lower number, but you'll need a higher rating if you routinely haul heavy loads around Oshkosh. The next letter is the speed rating. Not all tires sold in Oshkosh are speed rated. The ratings generally follow the alphabet: the further up the alphabet, the higher the speed rating - with the exception of H - it comes between U and V (don't ask why).

There's a lot of fine print that most Oshkosh area drivers probably need a magnifying glass to read. But there are a couple of other large print items of interest. One is the tread type: highway, mud and snow, all season, severe snow, etc.

And then there are the Uniform Tire Quality Grading System markings. The first is a tread wear index. 100 is the base line - a lower number is poorer and a higher number is better. All things being equal, a tire rated 200 would wear twice as long, on a government test track, than one rated at 100. These wear grades are only valid within the manufacturers product line - you can't compare with others. And it's important to note that a lower rating might be just what you want - a high performance, sticky tire has a softer rubber compound and won't wear as long, but boy, will it take those corners on twisting Wisconsin roads.

The next is a traction grade. This measures the tire's ability to stop on wet pavement in government tests. A - the best, B - intermediate, C - acceptable.

Temperature grade measures a tire's resistance to heat buildup in government tests. A, B and C - from best to acceptable.

It's safe for Oshkosh drivers to go with the vehicle manufacturers original equipment recommendations that came on your car. But if you want to make adjustments, you'll now be better equipped to communicate with your friendly and knowledgeable Auto Authority LLC tire professional.

Auto Authority LLC
804 Witzel Ave
Oshkosh, Wisconsin 54902
920-231-1016
http://www.autoauthorityoshkosh.com