AUTONET TV

Differential Service

When you're driving and turn a corner, you probably aren't aware of all that's going on with your wheels.  The outside wheels have a longer distance to travel than the inside wheels, so there are gears that allow the wheels to go at different speeds when you turn. 

That set of gears is called a differential.  In front-wheel drive vehicles, it's by the transmission and called a transaxle.  Rear-wheel drive vehicles have the differential, naturally, on the rear axle. Many all-wheel and four-wheel drives add a center differential since power has to go to the front and rear wheels. (Some newer vehicles power wheels with electric motors, but that's a whole different story.)

Time and distance traveled eventually can take their toll on the differential, and you may notice some noises you hadn't heard when your vehicle was newer.  Sometimes you'll hear a whir that might change in pitch when you turn.  You may hear clicking sounds when you're moving.  Others describe rumbling sounds coming from underneath during a turn. Another symptom of possible differential problems may be vibrations or shakes the faster you go. 

All of these could be signs that you have problems with a differential. One common cause of differential problems is the gears aren't getting enough lubrication.

These can all have serious effects on your driving.  You may find it hard to turn, or your wheels may lock up. That could put you or drivers around you in a dangerous position. 

It's better to take care of differential problems before they get too serious.  Bring in your vehicle so we can have a technician check yours out.  They can see if there are any differential fluid leaks or failing gaskets.  In some cases, we may recommend your differential fluid be replaced.  And if there are any mechanical issues, some components may need to be replaced as well. 

When your differential is maintained, you'll be doing your vehicle a good turn.  

Muffler & Go
1478 N Leroy St
Fenton, MI 48430
(810) 629-1066
http://www.mufflerandgo.net

Getting the Right Tires and Wheels in Fenton

A lot of people get custom wheels in Fenton. When you do this yourself (over the internet . . .) you could run into trouble if you're not careful. Sometimes, once they're mounted, they just don't fit right. The tires rub in turns or on bumps. You don't want that.

Consulting your Muffler & Go tire professional can ensure you get the right fit. First he'll ask you a series of questions about your Fenton driving needs and what you want in your new wheels. Now, not every wheel can go on every car. Care must be taken so that tires and wheels are not too large or that the wheel is centered too far towards the outside or the inside so the tires rub.

If you don't want to make any modifications to your vehicle, you would need to focus on the wheels that would fit. With trucks, some people in Fenton like much bigger tires so they need a suspension lift.

Also, most Fenton drivers don't realize that you need to keep the rolling diameter of your new tires – the overall height of the tire – very close to what came from the factory in order for your vehicle's anti-lock brakes and stability control systems to work properly.

The computers that control these systems are calibrated to a certain size tire. When you go bigger or smaller, the computer doesn't know what changes you made so it can't tell how fast you're going. This, of course, means it sends commands to the brakes and traction control that are based on the wrong speed. If you go with a different rolling diameter, your vehicle engine control computer can be reprogrammed for the new tire size.

Either way, there are hundreds of wheel and tire choices to choose from in MI. You can pick the style of wheel you want and then talk with your friendly and knowledgeable Muffler & Go tire professional about how big the wheel should be – and how to select the right tire for your vehicle. Your Muffler & Go service advisor will help you find the best tire to meet your style, performance, ride and handling needs in Fenton.

Muffler & Go
1478 N Leroy St
Fenton, MI 48430
(810) 629-1066
http://www.mufflerandgo.net

The Muffler & Go Guide to Servicing Your Differential

Differential? What's that? And what's it for? I've been told by my service advisor that I need to get it serviced, but is that on the level?

Do these questions sound familiar? They're not uncommon for Fenton drivers. A lot of us in Fenton don't know what a differential is or what it's for. Every vehicle has a differential, and, yes, it does need to be serviced. In fact, it's more important to the operation of your vehicle than the air conditioner or windshield wipers.

A differential allows your vehicle tires to move at different speeds. This happens more than you think. The best example is when a vehicle is turning. The inside wheel travels a much shorter distance than the outside wheel during a turn. This means the outside wheel has to move faster than the inside wheel. Without a differential, your tires would hop and skip while turning. They would also lose traction in sand or snow.

The location of your differential depends on what kind of vehicle you drive. On a rear-wheel drive vehicle, the differential is located in the back. For a front-wheel drive vehicle, it is located on the front, but it is usually called a transaxle. Four-wheel drive vehicles have three differentials: one on the front, one in the back and one in the middle. This center differential compensates for differences in speed between the front and rear wheels.

Your differential contains strong gears that need to be protected from dirt, debris, water and other contaminants. A differential is sometimes referred to as a “gear box.” The work of these gears is to transfer power from the vehicle drive train to the wheels.

Your differential needs fluid to lubricate and cool the gears. This fluid, even though enclosed in the “gear box,” can get dirty because the gears grind down over time, releasing tiny bits of themselves into the fluid. Also, the additives in the differential fluid break down and need to be replaced. That's why preventive maintenance for your vehicle needs to include servicing the differential.

Your owner's manual can give you recommendations on how often to service your differential. But you should also consult with your friendly and knowledgeable Muffler & Go professional. Muffler & Go can give you some good auto advice on whether your vehicle needs to be serviced more frequently. For example, if you drive in hot or cold MI weather conditions, your differential will need to have its fluid changed more often.

Severe conditions will also affect your vehicle care routine and your differential. Check your owner's manual for a definition of “severe service” conditions that affect your vehicle. Examples may include driving with frequent stops and starts, a lot of short trips around Fenton, hot or cold MI weather conditions and towing.

Off-roading is particularly hard on a vehicle's differential. If you are an off-roader, especially if you cross MI streams or waterways, it is important that you service your differential more frequently than the recommendations suggest.

Properly servicing your differential will extend its life and keep you out of Fenton auto repair shops. A smooth ride is the result of proper preparation and smart choices.

 Muffler & Go
1478 N Leroy St
Fenton, MI 48430
(810) 629-1066
http://www.mufflerandgo.net

Not-So-Common Sense (Sensor Failures)

So your vehicle won't start.  What's the first thing that comes to mind?  Battery dead? Starter motor worn out? Out of gas?  Well, those are all reasons that make sense.  But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it.  Here's how that works.

You have lots of computers in your vehicle.  They need to know the status of things so there are several sensors monitoring various things going on.  These sensors send information to the computers that adjust the fuel and air mixture so you don't waste fuel.  They know when things aren't quite right and prevent you from starting your engine if that's going to damage it. 

Other sensors make sure the coolant is the right temperature, check to see you are not polluting the air and make sure other electronic components are performing their tasks correctly.

Here's an example of a sensor doing its job.  Your engine needs oil to lubricate metal components so the friction doesn't damage them.  Your engine has an oil pressure sensor that tells a computer called the Electronic Control Unit (ECU) if things are good to go or if there's something wrong, maybe the oil pressure is too low to keep things lubricated.  If it is, it gives a signal for the vehicle not to start, protecting the engine. 

Of course, the sensors can go bad, too, with some of the same results.  And so someone has to figure out if it's the sensor that's failed or if it really has detected a problem.  That is the challenge for technicians with specialized equipment to decipher the signs.  If a bad sensor is found, it may need to be replaced.  Sometimes a thorough cleaning can do the trick.  In either case, your service facility can track down the problem and get you back on the road.  Makes sense, doesn't it?

Muffler & Go
1478 N Leroy St
Fenton, MI 48430
(810) 629-1066
http://www.mufflerandgo.net