how do you solve the "soft top side window flapping on highway speed"? - Jeep Wrangler Forum
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Old 04-18-2013, 02:29 PM   #1
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how do you solve the "soft top side window flapping on highway speed"?

Mine is sahara2dr 2013 with premium softtop but the side window flapping crazy on highway speed
I put hardtop back yesterday, but the soft top is my love, it goes topless faster , soft top will be perfect to me if it does not flap...
Anybody fixed the flapping problem? Maybe use a tape to paste the side window?

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Old 04-18-2013, 02:45 PM   #2
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A) sunrider top w/ all plastic windows off - flap on highway speeds bcuz the attached tailflaps acts like a mini parachute but minimal wind resistance as opposed to the rear window being attached.

B) sunrider top w/ side windows attached - should cause no flap.

C) sunrider w/ rear window attached - PARACHUTE

topless - should solve A and C.

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Old 04-18-2013, 02:47 PM   #3
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Originally Posted by dawhitesJKU View Post
A) sunrider top w/ all plastic windows off - flap on highway speeds bcuz the attached tailflaps acts like a mini parachute but minimal wind resistance as opposed to the rear window being attached.

B) sunrider top w/ side windows attached - should cause no flap.

C) sunrider w/ rear window attached - PARACHUTE

topless - should solve A and C.


I dont know if there is a way to "stop" the flap with a soft top. You could alwasy get a hard top...
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Old 04-18-2013, 02:48 PM   #4
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I put the pipe insulation (the black stuff) around the bars that are in front of the side windows.

You can postion it where the top still goes down no issue and most if not all of the flapping is gone.
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Old 04-18-2013, 03:08 PM   #5
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try driving slower or win its not so windy out
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Old 04-18-2013, 03:11 PM   #6
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Sounds like you did not tuck your windows into the door surrounds correctly. They should not flap.
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Old 04-18-2013, 03:13 PM   #7
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Sounds like you did not tuck your windows into the door surrounds correctly. They should not flap.
^that. The side window on the soft top should not flap. Puff out at highway speeds maybe, but no flapping.
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Old 04-18-2013, 03:14 PM   #8
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It's just the nature of the beast with a soft top. Used to bother me at first, but now I'm used to it. Luckily it only does it when it's real gusty out.
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Old 04-18-2013, 03:19 PM   #9
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Sounds like you did not tuck your windows into the door surrounds correctly. They should not flap.
i had this same problem, only it was caused by the dealer. they had the top down when i bought it and after hours of negotiating we finally finished at mid-night and i drove it home that night. they put the top up before i left and it was flapping all over the place. There are channels along the door that the L shaped plastic things go in. once you have them in it shouldn't flap anymore.
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Old 04-18-2013, 04:51 PM   #10
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Strange...I've had soft tops on my last 2 jeeps...have never noticed any window-flapping. Check your window sticker...maybe they included the Flapping option with the premium top.
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Old 04-18-2013, 05:08 PM   #11
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The seat belts will flap quite a bit too. I velcro strap them to the roll bars if not in use.
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Old 04-18-2013, 07:34 PM   #12
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For me, the soft top right above my head will flap sometimes in high winds or passing trucks. Solution is to inflate the top by running the blower........

I also have a brand new top and therefore its not totally in its final shape if you know what i mean.

Dunno if thats what youre talking about or not.

Love my soft top.
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Old 04-18-2013, 10:46 PM   #13
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Side windows will actually be sucked in and directly pressed against the bar when set up correctly. This is due to air movement and inside pressures that are less than outside. You can turn the blower on one click and the side windows will puff out - this is with the rear window in. With the rea window out, they will suck in and be against the bar now matter what.

Flapping is usually due to incorrect installation. Usually.
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Old 04-18-2013, 10:51 PM   #14
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The seat belts will flap quite a bit too. I velcro strap them to the roll bars if not in use.
^Yes. Simple fix. As for the flapping noises, I just turn up the stereo. Problem solved.
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Old 04-18-2013, 10:53 PM   #15
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Old 04-18-2013, 10:56 PM   #16
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As stated before, you don't have the L shaped leading edge of the rear window tucked into the door surround properly. I had to go to the dealership and look at the rear window to see how they are supposed to be installed. Properly installed they don't flap at highway speed.
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Old 04-19-2013, 07:47 AM   #17
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The other thing you can do, which I've successfully done in later TJ's with the tailgate vent and the JK, is to block the tailgate vent when you're running the soft top. I usually use gaffer's tape, since it comes off without leaving any residue. You definitely need the vent unobstructed with the hard top... But when you block it with the soft top, less air gets out, allowing the fan to do a better job pressurizing the top at higher speeds. This did more with the TJ, but it helped with my JKU, too. And needless to say, this only works with the windows up!
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Old 04-19-2013, 08:13 AM   #18
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i forgot to tuck the windows at the bottom my first time putting them back on and they flapped. there is a lip that the window tucks into where the door seals AND at the bottom. with my premium soft top, NOTHING flaps and i am stunned at how quiet it actually is at 70+.
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Old 04-19-2013, 08:35 AM   #19
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Whats so premium about the premium top and what do i have
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Old 04-19-2013, 08:39 AM   #20
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Whats so premium about the premium top and what do i have
The premium top has a new fabric which is more cloth like than the older tops. It also has a tighter fit and a headliner inside that the standard tops don't have.
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Old 04-19-2013, 08:46 AM   #21
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Whats so premium about the premium top and what do i have
The new premium top is three-ply with convertible top like material. There is a nice heavy twill fabric as the outer layer, than vinyl, and the. The inner layer is more twill. Very nice.


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Old 04-19-2013, 09:20 AM   #22
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Sounds like you did not tuck your windows into the door surrounds correctly. They should not flap.
I think this is the problem. It's very common to have the leading edge of the side windows installed correctly. Many think they are held in by the doors, which leads to them coming loose.

A correctly installed soft top & windows should not flap at any speed.
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Old 04-19-2013, 10:09 AM   #23
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The new premium top is three-ply with convertible top like material. There is a nice heavy twill fabric as the outer layer, than vinyl, and the. The inner layer is more twill. Very nice.


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Ooh, fancy. I don't have that.

I bet if i did have it i'd put the cheap top on when i replaced it after 5 or so years anyway.
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Old 05-06-2013, 08:21 PM   #24
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Originally Posted by mgola27 View Post

I think this is the problem. It's very common to have the leading edge of the side windows installed correctly. Many think they are held in by the doors, which leads to them coming loose.

A correctly installed soft top & windows should not flap at any speed.
I'm having the flap issue with my driver's side window (4 door). It simply will not stay seated within the edge of the door. I've tried over and over to reset the window but it comes loose where it's supposed to grab the edge. Passenger's side is okay. Thinking of adding Velcro to keep the offending flapper under control.
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Old 05-06-2013, 08:26 PM   #25
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I'm having the flap issue with my driver's side window (4 door). It simply will not stay seated within the edge of the door. I've tried over and over to reset the window but it comes loose where it's supposed to grab the edge. Passenger's side is okay. Thinking of adding Velcro to keep the offending flapper under control.
Have you read this thread and are sure you've installed them correctly?

It's very common for folks to think the doors themselves hold the windows in place. This is an incorrect assumption and will lead to the windows coming loose as you drive.

You need to ensure you have "rolled" the window edge completely into its channel.

Please post some pics and well get it sorted out. You should not need to add anything to a factory soft top to prevent flapping.
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Old 05-06-2013, 08:35 PM   #26
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Today the spring on the top cable on the passenger side came off. It caused the window to not fit tight. That couod be the ops problem as well. I just had to pop it back in.
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Old 05-06-2013, 09:05 PM   #27
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We need pics of the offending window problem folks.

As already mentioned at least 4 times. If the side window leading ledge is not rolled into the groove in the surround, it simply will not stay in place. When in place and doors closed there is absolutely NO WAY the window can come loose. AAMOF someone cannot even steal the side windows with the doors locked, they are that tight.

So you fellas having probs. if you can pull the side windows off without opening the doors, they are on wrong!
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Old 05-06-2013, 09:25 PM   #28
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I realised the other day that I have made this error, but I haven't yet got round to fixing it. What is the correct order in which to install the leading edge, bottom edge and zipper/velcro?
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Old 05-06-2013, 09:34 PM   #29
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If all windows are up, I turn on the vent to max. The positive pressure bulges out the windows and makes them silent. Of course this only works when all windows are on and closed.
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Old 05-06-2013, 09:38 PM   #30
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Quote:
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I realised the other day that I have made this error, but I haven't yet got round to fixing it. What is the correct order in which to install the leading edge, bottom edge and zipper/velcro?
I do this:
-start zipper a few inches
-bottom retainer
-door retainer part
-rest of zipper
-Velcro
I've never had it flap on me and I'm going on 5 years

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