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Discussion Starter · #1 ·
My S60R has about 6200 miles. Just got the wheels changed back for summer to the P Rossis. When I drive with the rear windows open there is a low frequency sound. So low you feel it in your ears before you actually hear it. At about 30 MPH you start to hear it. By 40 MPH it becomes uncomfortable. A while back I read about a TNN for a problem with the exhaust hitting. Could that be my problem? If yes what is the TNN?<p>By the way, what is the TNN for the jumping rear. I am experiencing that also.<p>Thanks.
 

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Re: 05 S60R noise (vdillon)

I had a similar problem with my old car. tires had been out of balance and wore oddly. I would have the tires checked to make sure they are ok.<p>The exhaust thing is when its raining or snowing and you get water/slush up in there it bends against the drive shaft.
 

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Re: 05 S60R noise (vdillon)

Have you had this noise problem before on the Pirellis in the same location? The only time I get noise from my tires is on certain pavements. They might be out of balance or uneven air pressure (if you haven't checked that out yet).<p>I believe you are referring to the wheel hop in your next question. If you do a search in the R forum (and search for recent) for wheel hop TNN, you should come up with something.<p>Someone will probably suggest this, so I guess I'll say it now...get some better tires when you get tired of the Pirellis. The ones on our cars suck!!
 

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It almost sounds like the situation I posted in the jacking thread a minute ago<p><A HREF="http://forums.swedespeed.com/zerothread?id=56500" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=56500</A>
 

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Re: 05 S60R noise (vdillon)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>vdillon</b> »</i></TD></TR><TR><TD CLASS="quote">My S60R has about 6200 miles. Just got the wheels changed back for summer to the P Rossis. When I drive with the rear windows open there is a low frequency sound. So low you feel it in your ears before you actually hear it. At about 30 MPH you start to hear it. By 40 MPH it becomes uncomfortable. A while back I read about a TNN for a problem with the exhaust hitting. Could that be my problem? If yes what is the TNN?<p>By the way, what is the TNN for the jumping rear. I am experiencing that also.<p>Thanks.</TD></TR></TABLE><p>Ok, at the risk of being viewed as a real a-hole, I'm goint to ask if this doesn't happen to go away when you put a front window down, does it? <p>I know my car, and my friend's S60 as well, have AWFUL buffeting / reverberations throughout the car when just the back windows are open. I mean, it HURTS.<p>Again, if I'm being MOTO (master of the obvious) just say so. But thought I'd throw it out there. I like to think outside the box.<p>Otherwise, I'd say possible flat spots from being stored all winter? How did you store them, stacked or upright?
 

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Re: 05 S60R noise (needsdecaf)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>needsdecaf</b> »</i></TD></TR><TR><TD CLASS="quote">...AWFUL buffeting / reverberations throughout the car when just the back windows are open. I mean, it HURTS.<p>Again, if I'm being MOTO (master of the obvious) just say so....</TD></TR></TABLE><p><br>Hey, not so MOTO, Joe. I've seen that reverberation in several cars. It was the first thing I thought of too. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"> <p>
 

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Re: 05 S60R noise (vdillon)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>vdillon</b> »</i></TD></TR><TR><TD CLASS="quote"><p>By the way, what is the TNN for the jumping rear. I am experiencing that also.<br></TD></TR></TABLE><p>Check here...<p><A HREF="http://www.v70r.com/forums/index.php?s=75670d513519a887e6bb5e6a713001a8&showtopic=2025" TARGET="_blank">http://www.v70r.com/forums/ind...=2025</A><p>The one you're looking for is TNN60-08-2005-03-23
 

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Re: 05 S60R noise (vdillon)

Like in the other thread, I think your tires are causing the sound because they are cupped or feathered from the car being out of alignment. How long did you have the Rossos on before you changed over? You may have an argument with the dealer that they delivered the car to you out of alignment- it would not be the first time. Also, I have found that the unsettled rear suspension is more prevalent when the car is out of alignment.
 

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Discussion Starter · #9 ·
Thanks for the responses.<p>I have been experimenting with the windows some more and have come to the conclusion that most if not all of the rhythmic roar I am experiencing is from wind buffeting. I was too quick to blame the tire guys because I had just gotten the car back from them and I had not ever driven the car with just the back windows all the way down.<p>I now feel stupid. Although I have to say I have never driven any other car that caused such discomfort from over pressure caused by wind buffetting.<p>In any event the the back end does jump out and the alignment feels off. In general the cars handling does not feel as solid as it before the wheel changes. <p>I think I will get the alignment and TNN60-08-2005-03-23 done and take it from there.
 

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Re: (vdillon)

With the wrong combination of windows/sunroof open, the wind buffeting in my wife's Lexus is so bad it will literally make you nauseous after about 10 seconds; completely unbearable. My R does it too with just the rear windows down, but not as bad as the Lexus.
 

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Re: (vdillon)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>vdillon</b> »</i></TD></TR><TR><TD CLASS="quote"><br>I now feel stupid. Although I have to say I have never driven any other car that caused such discomfort from over pressure caused by wind buffetting.<p>In any event the the back end does jump out and the alignment feels off. In general the cars handling does not feel as solid as it before the wheel changes. <br></TD></TR></TABLE><p>Don't feel stupid. My R (although it is a V so it has that huge rear cavity) has some of the worst buffeting pressure that I've ever felt. I'm kind of annoyed because I even get buffeting with just the sunroof open. Cracking a rear window always helps. Glad it was a simple fix. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"> <p>BTW. R&T Tech Editor Dennis Simiantis (sp) did an article about this a while back - 12 or 18 months ago if anyone is interested in the science.<p>If you feel like the alignment is off, get it aligned! As JRL says, alignment is KEY on these cars. I could not believe the difference the first time I had the car re-aligned (on the same tires, natch). Night and day.<p>Good luck. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 

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Re:

The R is the first car I've ever been in where I can actually feel the change in cabin pressure when I close the sunroof! The first time I did it with my wife in the car, I warned her. She totally blew me off and then said, "WTF, did your ears just pop?"<p>-Eric
 

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Ahhh, I know being an audio geek would let me respond to a question on here one day. The buffeting or low frequency noise you hear with the windows down is a product of hemholtz resonance. It's the same principle by which ported or vented speaker boxes work and the same principle that causes a coke bottle to sing when you blow across its open mouth.<p>The frequency of the sound (the note) is determined by the volume of air inside the cavity (car) and the volume of air in the ports (open windows). If you open more windows the frequency is raised. <p>That's oversimplified, but it's basically how it works.
 

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Re: Re: (Sue Esponte)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Sue Esponte</b> »</i></TD></TR><TR><TD CLASS="quote">The R is the first car I've ever been in where I can actually feel the change in cabin pressure when I close the sunroof! The first time I did it with my wife in the car, I warned her. She totally blew me off and then said, "WTF, did your ears just pop?"<p>-Eric</TD></TR></TABLE><br>Odd. I experience this with most cars.<br>You can't have a sunroof open and the rear windows down and also you can't put down the rear windows and not crack the front(s) a bit.<br>The Wagons are a bit worse than the sedan.<br>Many cars are like this and yes Volvos may be a bit worse than most. the more space in the rear the more buffeting you will get and sometimes it's plain untolerable
 

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Re: Re: (Sue Esponte)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Sue Esponte</b> »</i></TD></TR><TR><TD CLASS="quote"> She totally blew me off and then said, "WTF, did your ears just pop?"<p>-Eric</TD></TR></TABLE><p>Excuse me?
 

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Re: Re: (Johann)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Johann</b> »</i></TD></TR><TR><TD CLASS="quote">Quote, originally posted by Sue Esponte » <br>She totally blew me off and then said, "WTF, did your ears just pop?"<br>-Eric<p><br>Excuse me?</TD></TR></TABLE><p>Ha, Nyuk. It's hard to say anything on here anymore without somebody taking it off in that direction... <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0">
 

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Re: (Andy Wehmeyer)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Andy Wehmeyer</b> »</i></TD></TR><TR><TD CLASS="quote">Ahhh, I know being an audio geek would let me respond to a question on here one day. The buffeting or low frequency noise you hear with the windows down is a product of <B>hemholtz</B> resonance...</TD></TR></TABLE><p>That's He<B>l</B>mholtz to you.<br>Sorry, just doing JRL's spellcheck job tonight. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 
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