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Unread 07-15-2013, 09:58 AM   #1
dbstang
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2010 JK Wrangler 
 
Join Date: Aug 2006
Location: Central NJ
Posts: 13
Need Help Diagnosing Banging

Ok So I need some help diagnosing a banging I am feeling in the floorboard.


Some backround.

Recently installed a Trektop NX. You'll see why I am giving this info

Had the Jeep since February
2010 Sport.
3.25" RC lift
35" Dick Depek Tires


Installed Trektop in May (Fathers Day Present)

the next week went on trip started feeling this knock in floorboard.


Took Jeep to my Mechanic, Jeep sepcialist, to check supsension. Checked everything and says all OK. Checked ball Joints, all TRE and Sway bar links. He did mention 1 wheel out of balance so corrected that.

Has been quite for about three 3 weeks. But it happened again yesterday.

So here are the symptoms

1 - Does it a speeds over 55MPH
2 - Very sporadic doesn't do it all the time.
3 - can feel in Floorborad and is not time with suspension movement or steering wheel.

But i stumbled across somthing interesting yesterday.

During the trip down it did it. But not on Way back. Both ways on Highway with speed above 65.


Only difference is that on way down there the trektop sunrider was open on way back sunrider was closed.

So now I am thinking that it is aerodynamic related. Because the first trip I noticed it i had the sunrider back and the back windows out.


So has anyone experienced this.

Could it be the fenders banging?
When the hood flutters does it make banging?

Any ideas? It's driving me nuts and worries me that there is something in front that is going to break.

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Unread 07-15-2013, 03:34 PM   #2
zenman
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2013 JK Wrangler 
 
Join Date: Sep 2012
Location: Junction City, KS
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Oh, I thought this was about sex...
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Unread 07-15-2013, 10:39 PM   #3
TJeep32
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2009 JK Wrangler 
 
Join Date: Apr 2012
Location: Pittsford, MI
Posts: 413
Do u have a jku? If so, check the back seatbells. I was riding in the back of my parents jku and my seatbell was hitting the back of the.seat, and the top was off. The wind was moving it. And it sounded like a loud "banging". Hope this helped.

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Unread 07-16-2013, 09:57 AM   #4
dbstang
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2010 JK Wrangler 
 
Join Date: Aug 2006
Location: Central NJ
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I have a JKU and its not the seat belts. Had them belted in.

It's a knocking/banging that can be felt in the floorboard. I can feel it on both sides. I never saw the hood flutter, but then again i didnt look for it.

It seems that might be the culprit as it is speed related and areodynamic related. I orders a set of Daystar latches and we'll see if that solves it.
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Unread 08-13-2013, 03:25 PM   #5
BigMookalook
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2006 TJ Wrangler 
 
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Its the sunrider. at highway speeds it gets lifted up and slammed down so it's basically the front header slamming the rear bow. You can feel it in the floorboard. or really any solid place that your body touches the jeep. It's my ONLY complaint about the sunrider. I'm not sure how I haven't seen a ton of threads on this as it is annoying as hell. the Sunrider is the coolest feature of the top but it sucks to know that it's literally slamming itself apart. I haven't found a way to keep it from not doing that yet. It happens worse when the windows are out.
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Unread 08-13-2013, 05:27 PM   #6
JTPhoto
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Quote:
Originally Posted by BigMookalook
Its the sunrider. at highway speeds it gets lifted up and slammed down so it's basically the front header slamming the rear bow. You can feel it in the floorboard. or really any solid place that your body touches the jeep. It's my ONLY complaint about the sunrider. I'm not sure how I haven't seen a ton of threads on this as it is annoying as hell. the Sunrider is the coolest feature of the top but it sucks to know that it's literally slamming itself apart. I haven't found a way to keep it from not doing that yet. It happens worse when the windows are out.
Dude, you shouldn't use sunrider position on the highway. It's like a big parachute. I believe it says in the manual not for use at highway speeds.
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Unread 08-13-2013, 06:30 PM   #7
SubAtomicGenius
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Lol, next thing they'll end up banning the soft top when someone rips one off doing 85mph on the interstate....
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Unread 08-13-2013, 07:18 PM   #8
Prot
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I have a lot of hood flutter. It's visually disturbing, but it does not make any noise. You need to look elsewhere.
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Unread 08-14-2013, 10:51 PM   #9
BigMookalook
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Yeah elsewhere like the sunrider. Cause that's what is banging when you have the sunrider open at highway speed.
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Unread 08-15-2013, 08:48 AM   #10
dbstang
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Quote:
Originally Posted by BigMookalook View Post
Its the sunrider. at highway speeds it gets lifted up and slammed down so it's basically the front header slamming the rear bow. You can feel it in the floorboard. or really any solid place that your body touches the jeep. It's my ONLY complaint about the sunrider. I'm not sure how I haven't seen a ton of threads on this as it is annoying as hell. the Sunrider is the coolest feature of the top but it sucks to know that it's literally slamming itself apart. I haven't found a way to keep it from not doing that yet. It happens worse when the windows are out.

Yup figured it out last week. The header bangs on the Knob for the Rear door surround and you can feel it in the floorboard. Its way worse with the doors off and windows out.


I bought some small bungy cords and bungied it down and that worked. Makes it a little harder to put up and down but it seemed to cure it for now.
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Unread 08-15-2013, 08:23 PM   #11
Rags
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2012 JK Wrangler 
 
Join Date: Nov 2011
Location: Manorville, NY
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You shouldnt have a problem if you fold the material towards the back of the jeep as you collapes the bows. The first time i folded mine back, i let the bows and material fall naturally and it caught air like mad!
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