Fast knocking when on highway.

[bmxjordanbmx]

When I am on the highway and I give it gas and go faster than 100-110 I get this fast knocking noise coming from the drivers side. I can feel the vibration under me feet, but that doesn't mean it's there. I really want to know what it is so it is fixed ASAP, any help would be much appreciated! Below is a link to a video of the sound, listen closely and you'll hear it for the first few seconds. It's a fast loud knocking.

https://youtu.be/4O3mhXQ0a3s

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[credential23]

lift ur car and check underneath. Maybe theres something stuck on your wheels or something is hitting your struts. Maybe something is loose. :.02

[bmxjordanbmx]

Did that today and changed my wheels over to my brand new summers.

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[S.F.W.]

Did that today and changed my wheels over to my brand new summers.

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Possibly a wheel out of balance..

[bmxjordanbmx]

There seems to be some play in the CV axel

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[bmxjordanbmx]

I had my wheels balanced before I put them on today and I also had an alignment

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[jeff7670]

Ya I would think it is a CV axle

[bmxjordanbmx]

Ya I would think it is a CV axle
There is some slight up and down play in the CV and I can feel vibration by my feet so it would make sense

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[bmxjordanbmx]

So today I was told by my local garage that it is my exhaust causing harmonic vibration. One of my mounts for my exhaust just after the cat did rust off. Opinions?

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[morganc]

You could compensate by buying stiffer aftermarket exhaust bushings, but they're there for a reason. Get the hanger mount welded back on. A little play is normal in CV's, but they tend to make noise all the time when they're going bad, this is also exacerbated by turning.