AUTONET TV

Differential Service at TJ's Auto Center Inc.: Viva la Difference

Every vehicle on Illinois roads has a differential, and it is important to the proper operation of the vehicle.  But most Rockford 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 TJ's Auto Center Inc. in Rockford, 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 Rockford 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 TJ's Auto Center Inc. service advisor to find out how often your vehicle differential needs to be serviced.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

It Pays to Take Care of Your Transmission at TJ's Auto Center Inc.

If you've been paying attention, you've noticed that vehicle engines are getting more and more powerful in Rockford. At the same time, they are getting better and better fuel economy. I've gotta tell 'ya, most of that's because of technological advances in transmissions. To get a better understanding of why that is, let's talk bicycles.

You've probably seen plenty of cyclists on Rockford roads. Perhaps you ride yourself. Then you know that a cyclist's cadence is the number of times per minute he or she pedals. The ideal pedal speed is the zone where they can most efficiently generate power over a sustained period of time. The experienced Illinois cyclist uses her gears to keep her pedal speed in the ideal zone whether she's climbing a hill, cruising on a flat stretch or killing a downhill.

Think of it this way: if you have a 1-speed bike, you really have to pump hard to get up to speed. Your top speed is limited by how fast as you can pedal. And if you're climbing a steep Illinois hill – forget about it.

Now let's add a couple of gears: one lower and another one higher. With the lower first gear, you can get up to your ideal pedal speed more quickly. When you shift to second, your pedal speed drops below ideal for a while as you work to get back to peak efficiency. Same thing happens when you shift to third, but now you can go much faster than you could with a 1-speed bike using the same effort. Add more gears and you can see that it's much easier to maintain ideal pedal speed. The result, quicker starts, better hill climbing, higher top speed and, most of all, a lot less fatigue for the Rockford rider.

Like a cyclist on a bike, every vehicle engine has an ideal engine speed called its power band. When an engine is running in that zone, it can make power very efficiently. It's the vehicle transmission's job to keep the engine in the power band over a wide range of operating conditions. Today 5 or 6 speed automatic transmissions are pretty much the minimum, and 7 and 8 speeds are fairly common in Rockford.

Obviously these sophisticated transmissions are very expensive. In fact, next to your vehicle engine, your transmission is the most expensive component in your vehicle, so it pays to take good care of it. Your manufacturer has a recommended service interval for changing your old, contaminated transmission fluid. Servicing your transmission on schedule at TJ's Auto Center Inc. keeps it operating at its best and can prevent costly damage. Ask your friendly and knowledgeable TJ's Auto Center Inc. advisor if it's time for transmission service. Come see why smart Rockford drivers trust their transmissions to TJ's Auto Center Inc..

Give us a call.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

Engine Air Filter from TJ's Auto Center Inc.

Many Rockford drivers have found themselves in the following situation: They go to get their oil changed and their friendly service advisor at TJ's Auto Center Inc. recommends a new engine air filter. They say yes, but don't know what an air filter is or what it does.

If this has happened to you, rest assured that you did the right thing by getting a new one. But you should never be too embarrassed to ask your TJ's Auto Center Inc. service advisor for more information. It's your vehicle and you have a right to understand what you're paying for.

Let's review: "What does an air filter do?"

Air is the focus of this discussion. What is the air like outside in Rockford right now? Can you see any smog? Is it full of pollen? How about dust? Anyone in Illinois with hay fever can tell you that there's plenty in the air that you can't see. Well, the engine air filter's job is to clean that air before it goes into your vehicle engine, to mix with the fuel and be burned. Without an engine air filter, the inside of your vehicle engine would be extremely dirty from all the gunk that was burned in the cylinders.

In fact, your engine needs 12,000 times as much air as fuel for it to run. That little filter does a very big job. It's no wonder that the air filter gets dirty and needs to be replaced. Think about a vacuum cleaner. When the bag gets full of dust and dirt, the vacuum doesn't clean as well. It can't move enough air to create good suction. A clogged engine air filter is the same way - the vehicle engine can't get enough air to burn the fuel efficiently. That means less power and reduced fuel economy.

That's why your owner's manual has recommended that you change your filter at regular intervals. Of course the Rockford conditions you drive in will affect how quickly the filter gets dirty. If you drive in Illinois where it's very dusty or where there's lots of pollen or pollution, you may need to change the filter sooner. The filter is easy to check visually, so your friendly and knowledgeable TJ's Auto Center Inc. service advisor can quickly make the call. He might recommend immediate replacement or simply let you know that it is getting close and that you'll need to replace it soon - like at your next oil change.

Because a severely dirty vehicle air filter hurts your vehicle, many Rockford residents find that a new air filter pays for itself in better fuel economy before the next oil change. They also make premium air filters that have been proven to increase your horsepower and torque. If more power is important to you, a high performance air filter is some of the cheapest horsepower you can buy.

The better your car breathes, the better it runs - kind of like people. And don't worry - if you have a question or don't understand a recommendation just ask your TJ's Auto Center Inc. service advisor.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886

Breathe Deep in Rockford With a New Cabin Air Filter

Poor interior air quality is nothing to sneeze at, and Rockford auto owners might be interested to know that more and more new cars are coming equipped with a cabin air filter. Check your vehicle owner's manual, but they typically need to be replaced at around 12,000 to 15,000 miles (19,000 to 24,000 kilometers).

The filter is usually under the vehicle hood or under the dashboard. Some are a little tricky to get to, so you'll want to have your friendly and knowledgeable TJ's Auto Center Inc. service advisor take care of replacing them.

As we said, many Rockford people don't realize they have a cabin air filter and come to TJ's Auto Center Inc. saying "my vents are smelling bad." It usually turns out to be a dirty cabin air filter. A switch out and they're on their way, smelling sweet.

Rockford residents who suffer from allergies can really benefit from a cabin air filter as it keeps irritants to a minimum. If you're one of them, you'll want to replace your filter regularly.

If you do a lot of driving in dusty or polluted Rockford conditions, you'll need to change your cabin air filter more often.

Give us a call.

TJ's Auto Center Inc.
3427 E. State St.
Rockford, Illinois 61108
815-399-2886