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Old 10-04-2016, 12:54 PM   #1
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Car swaying left right (floating feeling) highway speeds

Lately I noticed on highway speeds 60-65mph (higher if i'm following the flow of traffic in the fast lane) my fr-s feels as if it slightly swaying side to side almost as if the wind was blowing it really hard making it feel as if the car is floating

tires are inflating up to spec of 35psi...alignment was done earlier this year...car is fully stock mechanically speaking. 2015 w/ just under 25K miles

any ideas? probably need to get another alignment?

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Old 10-04-2016, 12:56 PM   #2
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It is a light car so could be just the wind maybe??

maybe ruts in the road??
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Old 10-04-2016, 01:00 PM   #3
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It is a light car so could be just the wind maybe??

maybe ruts in the road??

it happens taking the highway to work and back everyday so far i noticed..tried different lanes just as a test and experienced the same thing

almost feels as if the car will snap the steering wheel feeling unstable...the best way i can compare it is as if i was driving on gravel
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Old 10-04-2016, 01:03 PM   #4
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alignment?
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Old 10-04-2016, 01:03 PM   #5
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That sounds like an alignment issue to me. If it was an older car I would suggest checking your bearings, because a worn/failing bearing would cause the same thing to occur (for the same reason, as it basically allows the hub to move around causing your alignment to constantly change.) I wouldn't bother chasing down other issues until confirming that the alignment is correct. It's possible you don't remember hitting a bump, but maybe you did hit something that threw the alignment off, or slightly bent a tie rod or something. Sounds like a classic case of poor alignment.
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Old 10-04-2016, 01:09 PM   #6
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Quote:
Originally Posted by Stang70Fastback View Post
That sounds like an alignment issue to me. If it was an older car I would suggest checking your bearings, because a worn/failing bearing would cause the same thing to occur (for the same reason, as it basically allows the hub to move around causing your alignment to constantly change.) I wouldn't bother chasing down other issues until confirming that the alignment is correct. It's possible you don't remember hitting a bump, but maybe you did hit something that threw the alignment off, or slightly bent a tie rod or something. Sounds like a classic case of poor alignment.
come to think of it there was this speed bump on a neighborhood road (i was not familiar with) that didn't really seem like a speed bump...it looked like small incline in the road as if it was recently patched but when i went over it i felt the car slammed down pretty hard so that might have been the culprit

i'll have the alignment checked first

'ppreciate it!
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Old 10-04-2016, 01:43 PM   #7
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Yeah maybe its the alignment
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Old 10-04-2016, 02:07 PM   #8
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come to think of it there was this speed bump on a neighborhood road (i was not familiar with) that didn't really seem like a speed bump...it looked like small incline in the road as if it was recently patched but when i went over it i felt the car slammed down pretty hard so that might have been the culprit

i'll have the alignment checked first

'ppreciate it!
Good plan .......


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Old 10-04-2016, 02:28 PM   #9
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+1 for alignment. I had my rear toe adjustment knocked out on one side and it felt like I was driving on ice.
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Old 10-04-2016, 04:42 PM   #10
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Sounds like an alignment. If you've put on a lot of miles since this issue began take a look at your tread wear in the meantime to see if it's uneven on an edge, or if it's cupping/feathering.
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Old 10-04-2016, 05:20 PM   #11
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Sounds like an alignment. If you've put on a lot of miles since this issue began take a look at your tread wear in the meantime to see if it's uneven on an edge, or if it's cupping/feathering.

i had a F150 rental for a month then when i got my fr-s back the steering felt stiff in a good way and it handled like it was on rails (had my fr-s back now for almost a month so i didn't put a lot of miles on it...handling was fine when i dropped it off at the body shop)...started noticing last week the swaying and the steering started to feel loose but i'm thinking my muscles got used to the tighter steering of the fr-s again versus the lightweight steering of a F150

i'll check out the tire tread too and make sure everything looks proper
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Old 10-04-2016, 07:25 PM   #12
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Could be tramlining as well. http://www.tirerack.com/tires/tirete....jsp?techid=47

I experience it on specific sections of the highway I commute. Usually sections with those parallel grooves vs flat asphalt.
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Old 10-04-2016, 11:14 PM   #13
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Old 10-04-2016, 11:20 PM   #14
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