Car shakes at 75-80 MPH
#16
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Judgedbyman your tires are still out of balance. End of story. Stop looking anywhere else. Take your car or just the wheels somewhere else. Or better yet rotate them at home for free and go for an 80mph spin and note the difference.
#17
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I had some vibration one time after I rotated my wheels. I was cruising down a highway when I noticed it. Pulled over and don't know why but I checked the lug nuts. Apparantly I didn't torque them very well (real "DOH" moment). Just saying you might want to check that too, you know, cover all your bases.
#18
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Tires can cause vibration even if there is perfect mass balance in the wheel. Its called radial force variation in the tire. All tires act like springs, and over the entire surface various parts of the tire are stiffer than others. This often happens when radial plies overlap, etc. So when a stiffer part of the tire contacts the road, you get un upward force. At speed, the force excites the vehicle and causes vibration, usually around 25-35 Hz at ~70 mph. Some radial force variation is normal. It happens on all tires, OEM and aftermarket. However, some tires (especially aftermarket) can have higher radial force variation. Or, as tires degrade (hit a pothole, uneaven wear, etc) RFV can develop over time. Also, if you bend your rim(s), this can cause a similar effect.
Generally, if a car shakes at highway speed, and alighnment, brakes, and wheel balance is good, and your rims arent bent...its usually tire force variation. The only way to fix it is new tires.
Some people have also found that rotating wheels works too. This is becasue the vehicle may be less sensitive to shake depending upon the position of the problem wheel(s).
On a FWD car, I doubt its drivetrain imbalance, unless something happened to your halfshafts.
Generally, if a car shakes at highway speed, and alighnment, brakes, and wheel balance is good, and your rims arent bent...its usually tire force variation. The only way to fix it is new tires.
Some people have also found that rotating wheels works too. This is becasue the vehicle may be less sensitive to shake depending upon the position of the problem wheel(s).
On a FWD car, I doubt its drivetrain imbalance, unless something happened to your halfshafts.
Last edited by Mercenary3; Aug 25, 2006 at 09:43 PM.
#20
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Originally Posted by Mercenary3
Tires can cause vibration even if there is perfect mass balance in the wheel. Its called radial force variation in the tire. All tires act like springs, and over the entire surface various parts of the tire are stiffer than others. This often happens when radial plies overlap, etc. So when a stiffer part of the tire contacts the road, you get un upward force. At speed, the force excites the vehicle and causes vibration, usually around 25-35 Hz at ~70 mph. Some radial force variation is normal. It happens on all tires, OEM and aftermarket. However, some tires (especially aftermarket) can have higher radial force variation. Or, as tires degrade (hit a pothole, uneaven wear, etc) RFV can develop over time. Also, if you bend your rim(s), this can cause a similar effect.
Generally, if a car shakes at highway speed, and alighnment, brakes, and wheel balance is good, and your rims arent bent...its usually tire force variation. The only way to fix it is new tires.
Some people have also found that rotating wheels works too. This is becasue the vehicle may be less sensitive to shake depending upon the position of the problem wheel(s).
On a FWD car, I doubt its drivetrain imbalance, unless something happened to your halfshafts.
Generally, if a car shakes at highway speed, and alighnment, brakes, and wheel balance is good, and your rims arent bent...its usually tire force variation. The only way to fix it is new tires.
Some people have also found that rotating wheels works too. This is becasue the vehicle may be less sensitive to shake depending upon the position of the problem wheel(s).
On a FWD car, I doubt its drivetrain imbalance, unless something happened to your halfshafts.
#21
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Mine seems to be better now but I can hear a noise from the tires. Its hard to explain that noise. The noise is dependent on how fast I drive. It get louder when I'm going faster and vice versa.
I get it when I'm turning right or going straight. Now when I'm turning left, the noise goes away.
I've bought new rims, new tires, had an alignment and got new coilovers.
then problem still exists. I've change rims and still the problem exist. I'm assuming suspension but all the suspension looks fine.
What else could it be
I get it when I'm turning right or going straight. Now when I'm turning left, the noise goes away.
I've bought new rims, new tires, had an alignment and got new coilovers.
then problem still exists. I've change rims and still the problem exist. I'm assuming suspension but all the suspension looks fine.
What else could it be
#26
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It's easier with the wheels off the ground, but you can do it even if you don't jack up the car.
Grab the wheel(the wheel, not the stearing wheel) at 9 and 3 O'clock
Now, thug it. Push on the left while pulling the right, push on the right while pulling the left. If you have a sever wheel bearing problem, you'll now right away. You'll feel it, you'll hear it. You'll just know something is wrong.
I had the same sympthoms you're having. When I did the wheel test thingy I just described I was able to thug the wheel by approximatly 1/8 of an inch.
http://www.autopartsway.ca/autoparts....0%20L4~241452
Is the cheapest I found when I changed mine
Last edited by blaze_125; Jul 10, 2009 at 12:45 PM.
#27
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Here's an easy way to check.
It's easier with the wheels off the ground, but you can do it even if you don't jack up the car.
Grab the wheel(the wheel, not the stearing wheel) at 9 and 3 O'clock
Now, thug it. Push on the left while pulling the right, push on the right while pulling the left. If you have a sever wheel bearing problem, you'll now right away. You'll feel it, you'll hear it. You'll just know something is wrong.
I had the same sympthoms you're having. When I did the wheel test thingy I just described I was able to thug the wheel by approximatly 1/8 of an inch.
http://www.autopartsway.ca/autoparts....0%20L4~241452
Is the cheapest I found when I changed mine
It's easier with the wheels off the ground, but you can do it even if you don't jack up the car.
Grab the wheel(the wheel, not the stearing wheel) at 9 and 3 O'clock
Now, thug it. Push on the left while pulling the right, push on the right while pulling the left. If you have a sever wheel bearing problem, you'll now right away. You'll feel it, you'll hear it. You'll just know something is wrong.
I had the same sympthoms you're having. When I did the wheel test thingy I just described I was able to thug the wheel by approximatly 1/8 of an inch.
http://www.autopartsway.ca/autoparts....0%20L4~241452
Is the cheapest I found when I changed mine
Yest of course! This a good way to check the wheel bearing. I usually try to tilt it up/down and left/right to check for bearing play. I'll have to check mine tomorrow. BTW, thanks for the link!
#28
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I was having a similar problem between 45mph-65mph my car would shake like hell , but 0-45 was good and 65-80 was good... I drove about 1000 miles or so like this witch is only a week or so of driving for me... All of a sudden wam at 70mph the rear tire completely shredded the tread seperated from the tire , it was quite exciting... Pulled over swapped the tire out and havent had any issues since... But during that whole week I was thinking wheel bearings , tie rod ends, alignment , balance, ect...
#29
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my front end feels like it's going to shake off at about 65-75 mph, steering wheel shakes back and forth as well, but no bend in the rim. what up? i have extreme lancer lean to the driver's side in the front, could it be struts and springs? have already replaced the front lower control arms, front sway bar links, had tires rotated and alighned, and balanced twice till thery are now dead on, changed my plugs too. (thought maybe plugs causing vibration) still I 'm shaking like a branch in a hurricane. NEED HELP
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