AUTONET TV

Winter Tires

What type of technology do you use? Do you prefer an 8-track tape or an iPod? When it comes to winter tires, much of Walnut Creek driver's perception dates back to when 8-track was the best way to listen to the Bee Gees.

Twenty years ago in CA, winter tires differed from highway tires only in their tread design. CA drivers called them snow tires back then, and they had big, knobby lugs that were designed to give good traction in deep snow. They had the same rubber compound as regular tires and they weren't very good on ice, packed snow or wet CA roads. They were not even very good on dry roads. They really helped in deep or loose snow, but they did a poor job the rest of the time. They were loud and rode hard. People couldn't wait to get them off in the spring.

Then all-season tires started to appear in Walnut Creek tire shops. All-season tires are really a compromise between summer and winter performance. They have acceptable hot weather ride and tread life and can get CA drivers through mild winter road conditions OK. But there are some really good reasons to consider winter tires.

Modern winter tires do a terrific job for CA driving in a wide range of winter conditions. First of all, below 45°F/7°C, regular tires become hard and inflexible. That means they don't provide the road grip CA vehicles need. Even if you don't live somewhere in CA with a lot of snow, but it still gets below 45°F/7°C in the winter, you will be safer with winter tires.

In addition, they are specifically designed to more effectively move snow and water. That's the key to traction on ice-packed snow and wet Walnut Creek area roads. They use a micropore compound that allows the tire to bite into ice and snow. They also use wider grooves that run around the circumference of the tread to expel snow from the tire better. The lugs and grooves on winter tires have a special shape that throws the packed snow out of the tread as the tire turns. The tread is then open when it comes back in contact with the road and can provide good traction for CA drivers.

Winter tires also have a lot of sipes. Sipes are thin slits in the tread. The edge of the sipes grab ice and packed snow to provide tons of traction and to expel water and slush out of the tread. Winter tires have a rounder casing to cut into the snow's surface. The treads on regular summer tires can actually get packed with snow instead and become very slick. Winter tires offer 25% to 50% more traction for CA drivers than all-season tires. And when it comes to stopping power, all-season tires take 42% longer to stop than winter tires. Sometimes that's the difference between getting home safely and spending the night in a snow bank.

Now back when the 8-track was king, CA drivers just put snow tires on the drive wheels. That worked out OK because the rubber compound was essentially the same. Now, winter tires provide so much more traction than all-season or summer tires, that there's a huge difference between the traction at the front and rear ends of the car if you only put winter tires on the drive wheels.

For example: if you take a corner on an icy road and the rear end starts to slide out, essentially the rear is trying to pass the front because it's going faster. If you have high traction winter tires only on the front, they are going to be much more effective at transferring cornering grip and stopping power to the front wheels. This will actually cause the rear end to whip out even more.

That's why tire manufactures instruct their dealers that they must install winter tires on the rear wheels as well whenever they put winter tires on the front end of any vehicle. It's a major safety concern. It's strongly recommended that winter tires be installed on all four wheels on rear wheel drive vehicles as well. The front tires do most of the steering and braking work - it only makes sense that you provide the front end with the best traction you can.

Walnut Creek drivers often assume that if they have four-wheel drive or all-wheel drive they don't need winter tires on all four wheels. Would you intentionally disconnect the four-wheel drive in poor road conditions? Of course you wouldn't, but that's essentially what you do if you only put winter tires on one end. It only makes sense to have the same level of traction and control at all four corners.

The province of Quebec in Canada has issued a law requiring all passenger vehicles, taxis and rental cars with Quebec license plates to install a full set of four winter tires between November 15th and April 1. It's that important.

Many modern cars have traction control and anti-lock brakes so CA drivers may think that they don't need winter tires. But you need traction to accelerate, steer and stop. The tires provide the traction so that the traction control and anti-lock brakes have something to work with.

Look for tires with the symbol of a mountain with a snowflake in it. This means the tire complies with the severe snow standard. All-season tires will have an M&S, for mud and snow, on the sidewall.

So when the Walnut Creek temperatures drop below 45°F/7°C, be sure you have a set of four winter tires for maximum performance on snow, packed snow, ice, plus wet and dry roads. Your friendly and knowledgeable Gilmore's Auto Service tire professional can help you find the right winter tire for your vehicle and driving needs.

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net

A Cool and Smooth Transmission in Walnut Creek

When it comes to preventive maintenance on our vehicles, most of us Walnut Creek drivers remember to get our oil changed. But services that occur at longer intervals — like transmission service — sometimes get overlooked. Yet transmission service is part of car care. A poorly maintained transmission will fail and lead to repairs.

The transmission transfers power from the engine to the drive wheels. When it's clean and well-lubricated, it gives maximum fuel efficiency. But when it gets dirty or worn down, your transmission will suffer. Your transmission relies on transmission fluid to keep everything running well.

This is why the transmission fluid must be changed periodically. Your owner's manual will give you a recommended time schedule for this service. Or, you can ask your friendly and knowledgeable Gilmore's Auto Service service advisor. Generally, the interval is around 35,000 miles (55,000 km) or every two years. But the interval for your vehicle may be shorter or longer.

At Gilmore's Auto Service in Walnut Creek, transmission fluid can usually be changed while you wait and is simple and not particularly expensive. Compared to the cost of transmission repairs or a new transmission, it's downright cheap! So take some good auto advice from the team at Gilmore's Auto Service and take care of your transmission. It will pay you back in a longer, smoother ride.

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net

A Not-So-Straight Story (Vehicle Pulls to One Side)

A vehicle should travel straight down a straight road with the steering wheel centered.  But time and travel can take their toll and soon you may find your vehicle pulling to the left or right.  Those are not good signs and should be taken care of fairly quickly.

One thing that you should note is when this is happening: if it is all the time, only when you brake, only when you accelerate. If you describe these symptoms to the service adviser or technician, it may help them pinpoint the cause more quickly. 

Many things can cause a vehicle to pull to one side, one of which is that it's out of alignment.  If so, you could be doing damage to other components of your vehicle if you keep driving with it this way. If your tires show signs of uneven wear on the treads or if your wheels squealing, that is another clue.

Improperly inflated tires can also cause your vehicle to pull in one direction.  Your service facility can check to see if your tires have the pressure recommended by your vehicle's manufacturer. 

When steering linkage wears out or a wheel bearing goes bad, both of those can cause a vehicle not to track straight. When components age and loosen up, they can present a safety hazard and premature tire wearing. 

Maybe you notice the pulling only when you are braking.  That points to a failure of your braking system, perhaps a sticky brake caliper.

When your vehicle was brand new, it went straight unless you guided it on a different path. It's best to have it checked out if it is showing some of these symptoms.  It could save you money in the long run and you'll be driving a safer, better performing vehicle.  That's what they mean by steering you right!

Gilmore's Auto Service
2151 N Broadway
Walnut Creek, CA 94596
(925) 939-9430
http://www.gilmoresauto.net