MainStreet Transmissions

and Auto Repair LLC




GA  30268



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Changing Seasons Means More than Changing Temperatures

Proper tire maintenance keeps you safe and your vehicle performing at its best. Checking tire pressure is one of the most important, yet commonly overlooked inspection procedures. Consider the fact that air pressure is responsible for supporting the weight of a car, not the tires themselves. Manufacturer’s tire pressure specifications are designed to ensure peak handling and traction while maximizing fuel efficiency and tire service life.

Maintaining recommended tire pressure is more than simply “fill it and forget it.” Tire pressure fluctuates for a variety of reasons. Seasonal changes in temperature impacts tire pressure significantly, whether increasing or decreasing. Hotter temperatures cause air in tires to expand, which can result in tires being over-inflated. Cooler temperatures have the opposite effect, reducing air pressure. Interestingly, it is estimated that a 10°F change in temperature will increase or decrease tire pressure by 1 pound per square inch, or 1 PSI. In North America, the average change in temperature between summer and winter months is 50°F, meaning that changing seasons could impact tire pressure by 5 PSI or more, assuming no additional air loss has occurred. Normal driving also affects tire pressure. It’s estimated that within several miles of driving, tire temperature can rise by 20°F, increasing tire pressure by 2 PSI.

The effect of changing temperatures on tire pressure explains why drivers with TPMS (Tire Pressure monitoring System) equipped vehicles experience low pressure warning lights as temperatures drop. Unfortunately, drivers of vehicles without TPMS may not be aware of a possible unsafe tire condition.

The key to maintaining proper tire pressure is to check your tires regularly, especially during seasonal changes in temperature. For best results, always check tire pressure when the tires are cold, or only after driving the vehicle a short distance. And always follow the manufacturer’s recommended tire pressure, found in the vehicle owner’s manual or tire information placard (see fig. 1) located on the driver side door jamb.



Your tires provide your car with the traction it needs for safe travel. Tires that are worn or underinflated can pose a safety hazard, and they can also diminish vehicle performance and fuel economy.

Start by using a tread depth gauge to check the tread depth on your car’s tires. If the tread measures 4/32 inches or less, it’s a good idea to replace the tire.

Next, use a gauge to check the tire pressure. Make sure each tire is inflated to the recommended pressure listed inside the car’s door jamb.

You may also want to consider whether your current tires are the best ones for the job. Do you live in a part of the country where the temperature regularly drops below 45 degrees Fahrenheit in the winter? If so, you may want to switch your current tires for winter tires. Winter tires provide better grip than all-season tires in ice, slush and tightly packed snow.


Your windshield wipers keep your windshield free of precipitation so you can maintain proper visibility. If your wipers’ blades are worn, they won’t be able to do their job.

Check the blades by turning on your car’s wipers and windshield washer. The wipers should leave your windshield clear. If there are streaks or smudges, the blades may need to be replaced.

Inspect the washer fluid while you’re at it. If you currently have a summer blend, replace it with a winter blend that resists freezing.


You don’t think about your car’s heater in warm weather, but it’ll be top of mind once winter sets in and you need to raise the cabin temperature.

Turn the heater on to make sure it’s performing as it should. If it’s blowing cold air instead of hot air, you may be dealing with an issue like a clogged heater core or a damaged water pump. The fall season is a good time to take care of any necessary repairs in this area.


You’ll need your brakes more than ever when you’re traveling on icy roads. Be sure to get your brake system checked at an auto repair shop. This inspection should include the rotors, brake linings and drums.


Cold weather can tax your car's battery, so it’s important to cruise into the winter season with a healthy one under the hood. Look at the battery connections to make sure they’re securely attached and free of corrosion. If your battery is more than three years old, consider replacing it before winter arrives.


Engine coolant helps make sure your car’s engine doesn’t freeze. If the coolant level doesn’t reach the “Full” line on the side of the reservoir, take a few minutes to top it off.

Winter weather can test your car, but by following these tips, you can ensure that your vehicle is in fighting shape for the cold days ahead.



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We are MainStreet Transmissions and Auto Repair.  We believe in providing quality service at an affordable price.  We are a family owned and operated business and have been in Palmetto for 15 years.  We are members of the community and also live in the community we service.  We stand behind our service...our reputation is important to us and we strive to keep our customers happy.