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Why does my truck sound like a helicopter?

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Old 07-09-2009, 10:27 PM
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Why does my truck sound like a helicopter?

I have a 2004 F150 super cab and since owning it have had very few problems and never any major mechanical issues with it. It's paid off and still running strong. The only thing I can't figure out about it, even after 5 years, is why when I roll the back windows down at highway speed I get an eardrum pounding "whump, whump" sound that seems to pulsate through the cab. The pressure is hard enough to hurt your ears and distort your vision, and it literally sounds like a chinook helicopter is landing on top of the thing. The only way to alleviate it is to rolll down all of the windows, which I don't like to do. I assume it's something to do with the aerodynamics of the vehicle, but I'm just curious if anyone else has ever experienced this or found a way to reduce or elliminate it?

thanks,

JR
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  #2  
Old 07-09-2009, 10:35 PM
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Location: Winnipeg, MB
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Do you have a sliding rear window? If so, open it about an inch, problem solved.
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Old 07-09-2009, 10:39 PM
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Open the front windows, problem solved
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Old 07-09-2009, 10:49 PM
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Location: Punta Gorda/ Boca Raton, FL
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dont roll the back windows down... problem solved.

hehe, theres one is every crowd.
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  #5  
Old 07-09-2009, 10:50 PM
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Location: Fort Myers, FL
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It is the imbalance of air trying to enter and leave the cab. If given a small slit or avenue for the air to travel front to back it will not do that.
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  #6  
Old 07-09-2009, 10:55 PM
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Quote:
Originally Posted by yetti96 View Post
It is the imbalance of air trying to enter and leave the cab. If given a small slit or avenue for the air to travel front to back it will not do that.
x2
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  #7  
Old 07-10-2009, 12:51 PM
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Join Date: Apr 2007
Location: McAllister, MT
Vehicle: 2006 ford f-150
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the ford freestyle does this extremely bad. It actually hurts everything on your body. I thought the windows were going to shatter. I have an 06 scab but don't have a problem with the "helicopter effect".
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Old 07-10-2009, 01:18 PM
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Same thing happens in my fiance's car (Pontiac Vibe) with the sunroof. If you open the sunroof it is just fine but the little plastic thing that springs up in the front is what redirects the air on hers, pull it down and you get the same feeling.
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  #9  
Old 07-10-2009, 02:27 PM
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Just crack open the fronts, crack open the sunroof (if you have one) or the rear slider (if you have one)......
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