What causes car to feel like its mildly swaying or swerving when driving on highway along with difference in ride bounciness?

Answer 1

There are three typical causes to the problem you describe: 1 - The front and/or rear-end are out of alignment on the vehicle. Take it in to a mechanic shop that specializes in 2 and 4 wheel alignments and have it checked. Some shops actually offer the check for free. 2 - The tires are not balanced properly and/or there are mismatched tires on the car. Steal belted tires, for instance, react differently than glass belted tires. Having both types on the car at the same time can cause the car to "wander" at times depending on road conditions. 3 - The shocks or struts need to be replaced. RyanV answer: why does nobody hit the nail on the head? OK, the above is probably correct. But I bet my answer is a lot more helpful. I know it was for me, when I learned this... all the websites say such stupid things (don't drive until you get it fixed! etc.) turns out, it's not a major problem. For me, it only occurs on freeway, 55+ mph. And only on the white cement pavement (not black asphalt) and only the cement that has grooves in it (for water probably). Also, the final ingredient, is my new tires (4 of them, so don't tell me I have mismatched tires i.e. #2 above). >depending on road conditions. that's the smartest thing I read here. My mechanic and I agree that as the new tires wear down, this problem will diminish. And it's not a safety issue. Despite that it does feel like my tires are about to fall off. It was scary when I first felt it...