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Old 03-12-2014, 08:34 PM   #1
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Hood Bounce

Hey everyone, I was driving in some pretty good wind today and I noticed that my hood was bouncing a little I checked the latches and they were fine, has anyone had this problem and will after market latches fix this? Thanks in advance.
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Old 03-12-2014, 08:39 PM   #2
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Originally Posted by btuck37 View Post
Hey everyone, I was driving in some pretty good wind today and I noticed that my hood was bouncing a little I checked the latches and they were fine, has anyone had this problem and will after market latches fix this? Thanks in advance.
Yes, it is more unnerving than anything. I got the drake hood hold downs. I thought they looked neat, do a good job, and leave the hood easy to open. Others did the rampage locking latched.

Here is a recent thread with opinions.

Hood flutter??

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Old 03-12-2014, 08:43 PM   #3
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Originally Posted by btuck37 View Post
Hey everyone, I was driving in some pretty good wind today and I noticed that my hood was bouncing a little I checked the latches and they were fine, has anyone had this problem and will after market latches fix this? Thanks in advance.
Yep, everybody's does this.

It's harmless, it's not going to cause damage or fly off or anything. Some of the aftermarket latches will eliminate the effect, and I suspect adding some vents would as well since it eliminates the pressure build up under the hood. For my money, I'd rather vent the hood, since that's also functional for cooling.
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Old 03-12-2014, 08:43 PM   #4
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The Rugged Ridge work well.

Rugged Ridge 11210.11 Black Aluminum Hood Catch Set, Pair
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Old 03-12-2014, 08:44 PM   #5
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Did you remove your Air Dam? If you did, then this seems to be a major contributor, as most have stated.

Mine is a 2013, air dam still on, and I have absolutely no hood bounce/flutter.
In fact yesterday, I was on a 350 mile round trip up in our mountains in Arizona.
I was driving speeds of up to 80, most of the time 70-75, and it was windy, and I was passing semi trucks, and nothing from my hood. I intentionally watched for it, because of other members complaining about it.
So it appears that some do it, and others don't!

OP, in answering your question, yes there are after market latches that will solve your issue.

Go up to the search feature, and just type in HOOD FLUTTER. You will see the many Threads on this!
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Old 03-12-2014, 08:48 PM   #6
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Did you remove your Air Dam? If you did, then this seems to be a major contributor, as most have stated.

Mine is a 2013, air dam still on, and I have absolutely no hood bounce/flutter.
In fact yesterday, I was on a 350 mile round trip up in our mountains in Arizona.
I was driving speeds of up to 80, most of the time 70-75, and it was windy, and I was passing semi trucks, and nothing from my hood. I intentionally watched for it, because of other members complaining about it.
So it appears that some do it, and others don't!

OP, in answering your question, yes there are after market latches that will solve your issue.

Go up to the search feature, and just type in HOOD FLUTTER. You will see the many Threads on this!
Oh yes, it's definitely because of the lack of an air-dam. I removed mine and it immediately started happening. That's probably the only reason that cheap plastic piece is there. Anybody who's got an aftermarket bumper will experience it because that involves removing the air dam.
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Old 03-12-2014, 09:02 PM   #7
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Mine (well my bride's fluttered even w the air dam in place.

An interesting phenomenon, I'm surprised that the engineers did not pick up on this during testing, etc.
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Old 03-12-2014, 09:10 PM   #8
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Originally Posted by CBirnley View Post
Mine (well my bride's fluttered even w the air dam in place.

An interesting phenomenon, I'm surprised that the engineers did not pick up on this during testing, etc.
It's a feature to provide additional cooling by fanning the hood at higher speeds
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Old 03-12-2014, 09:15 PM   #9
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the rugged ridge work well.

Rugged ridge 11210.11 black aluminum hood catch set, pair
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Old 03-12-2014, 09:29 PM   #10
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Yep, everybody's does this. It's harmless, it's not going to cause damage or fly off or anything. Some of the aftermarket latches will eliminate the effect, and I suspect adding some vents would as well since it eliminates the pressure build up under the hood. For my money, I'd rather vent the hood, since that's also functional for cooling.
i have rugged ridge hood, which is the most vented production hood on the market, still get some on a strong headwind gust or passing semi
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Old 03-12-2014, 10:06 PM   #11
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Just remove your hood spring. Worked for me.
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Old 03-12-2014, 10:16 PM   #12
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Spinlock should be Spinmaster! What an incredible idea, leave it to Chrysler! Sort of like the spoiler we had I on our 2001 Tourcedes, totally helped that fwd stick to the road.
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Old 03-12-2014, 11:44 PM   #13
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The Air Dam is designed to improve air flow. It creates a low pressure zone under and behind the engine, causing a venture effect that will help to pull air through your radiator core for better cooling.
When this air dam is removed, then the low pressure zone is also removed, and cooling system efficiency will be reduced somewhat. Also the air will flow more readily up into the engine compartment, and will cause the hood to flutter more.
It all has to due to aerodynamics!

As for the hood flutter, installing different after market latches will solve this issue. As for the cooling system, unless that you live in a very hot environment, then you probably won't notice much of a difference!
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Old 03-13-2014, 12:48 AM   #14
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Did you remove your Air Dam? If you did, then this seems to be a major contributor, as most have stated.
It is stock besides wheels,tires, and ball joints so yes the air dam is still in. Thanks everyone for the help I think I will order some new latches and see how that works. It only does it on really windy day. Sorry to start a new thread in this topic.
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Old 03-13-2014, 01:25 AM   #15
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It is stock besides wheels,tires, and ball joints so yes the air dam is still in. Thanks everyone for the help I think I will order some new latches and see how that works. It only does it on really windy day. Sorry to start a new thread in this topic.
My air dam wasn't on the Jeep when I bought it and the first time I went on the highway the hood flutter scared the hell out of me. We get some gnarly wind on the front range here in Colorado. The wind amplified the flutter, it was crazy. I immediately stopped at 4 Wheel Parts and got a set of Daystar hood latches for $25; it took me 10 mins to install and I never had anymore issues with the hood fluttering.

I never knew yhe air dam reduced the hood flutter until I came across this thread, so I learned something new today.
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Old 03-13-2014, 01:37 AM   #16
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I never knew yhe air dam reduced the hood flutter until I came across this thread, so I learned something new today.
I'll have to see if I have one. So on guessing they only come on certain models?
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Old 03-13-2014, 02:16 AM   #17
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I'll have to see if I have one. So on guessing they only come on certain models?
I think most of the JKs have them. Granted, there are a lot of different style bumpers, but for the most part I think a large majority have an air dam. I've been shopping around for a bumper and most of the ones being sold on Craigslist have air dams.

I bought my Jeep used and the previous owner removed it for some reason. Its possible that he had an aftermarket bumper and put the stock one back on before selling.
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Old 03-13-2014, 03:53 AM   #18
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The Daystar hood latches work great to fix the problem. 5 years now and no problem. Plus they are easy to install.
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Old 03-13-2014, 04:54 AM   #19
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My hood issue was eliminated when I switched to the AEV heat reduction hood. The vents eliminated the low pressure/high pressure variant. It negates the Bernoulli lift effect. Anyway it's gone. (A pilots perspective)
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Old 03-13-2014, 05:01 AM   #20
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Never have had hood bounce or any issues with my hood. I do have the factory hood insulation maybe this helps prevent the flutter issue.
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Old 03-13-2014, 05:47 AM   #21
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^^^As I stated earlier, I don't have any flutter either and mine also has the insulation. I wanted to install the stubby bumper MOD, but that requires removing the Air Dam. I know the hood latches can be replaced, but living in Phoenix, which will be 110 plus in June, I need all of the cooling system available, so I am going to leave the Dam on. I don't know how it would look if I went with the stubby Bumper, and just trimmed the sides of the Dam.........
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Old 03-13-2014, 06:09 AM   #22
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^^^As I stated earlier, I don't have any flutter either and mine also has the insulation. I wanted to install the stubby bumper MOD, but that requires removing the Air Dam. I know the hood latches can be replaced, but living in Phoenix, which will be 110 plus in June, I need all of the cooling system available, so I am going to leave the Dam on. I don't know how it would look if I went with the stubby Bumper, and just trimmed the sides of the Dam.........
I think the contribution of the air dam to cooling and the prevention of hood flutter is overstated. My hood fluttered from day one. When I put my aftermarket bumper on, I removed the air dam. There was no noticeable change in the hood flutter. After too many passengers mentioned how scary it was watching the hood, I changed the latches. I live in Houston, Texas where we routinely hit 100+ deg F during the summer and have had zero cooling problems.

So, based on my experience, the effect of the air dam on cooling and hood flutter is insignificant.

Also, my buddy just drove back from San Antonio yesterday. As soon as he got home he called me asking what to do about the hood. He has a brand new bone stock JKUR. His passenger literally jumped twice because the hood fluttered so bad. He had been in mine before I changed the latches, but it took some talking to reassure his passenger that the hood wasn't coming off.
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Old 03-13-2014, 06:09 AM   #23
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^^^As I stated earlier, I don't have any flutter either and mine also has the insulation. I wanted to install the stubby bumper MOD, but that requires removing the Air Dam. I know the hood latches can be replaced, but living in Phoenix, which will be 110 plus in June, I need all of the cooling system available, so I am going to leave the Dam on. I don't know how it would look if I went with the stubby Bumper, and just trimmed the sides of the Dam.........
I'm trying to picture it but I'm not sure about it yet. I don't think it'll make that big of a difference. My second home is Vegas and I'm there without an air dam in 110+ degree weather. I've never noticed any issues.

I do understand that sometimes it's better to be safe than sorry. Right now I guess you're dealing with this Dam dilemma.

If you do end up going with the stubby and trimming the dam. Please post a few pics. I'm curious how it would look.
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Old 03-13-2014, 06:21 AM   #24
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I think the contribution of the air dam to cooling and the prevention of hood flutter is overstated. My hood fluttered from day one. When I put my aftermarket bumper on, I removed the air dam. There was no noticeable change in the hood flutter. After too many passengers mentioned how scary it was watching the hood, I changed the latches. I live in Houston, Texas where we routinely hit 100+ deg F during the summer and have had zero cooling problems.

So, based on my experience, the effect of the air dam on cooling and hood flutter is insignificant.

Also, my buddy just drove back from San Antonio yesterday. As soon as he got home he called me asking what to do about the hood. He has a brand new bone stock JKUR. His passenger literally jumped twice because the hood fluttered so bad. He had been in mine before I changed the latches, but it took some talking to reassure his passenger that the hood wasn't coming off.
This is what doesn't make any sense, is why do some stock do it, and others don't. If mine did it, which it doesn't, then it would be back to the Dealer for their nickel to repair it!

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I'm trying to picture it but I'm not sure about it yet. I don't think it'll make that big of a difference. My second home is Vegas and I'm there without an air dam in 110+ degree weather. I've never noticed any issues.

I do understand that sometimes it's better to be safe than sorry. Right now I guess you're dealing with this Dam dilemma.

If you do end up going with the stubby and trimming the dam. Please post a few pics. I'm curious how it would look.
Thanks for both of your posts, regarding the cooling system, I may give it a try, and just see what happens. I still think that I may try trimming the sides of the Dam, if it doesn't look good, then I can always take it off.

As I think back, my TJ didn't have a air Dam on it, and it cooled just fine in high temperatures, but the 4.0 required less cooling! But then again, it probably had less frontal area, (smaller radiator core).
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Old 03-13-2014, 08:20 AM   #25
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I think there are a lot of parameters that interact that can result in the presence or absence of hood flutter. Some of the parameters I can think of are
1. Differences in the stiffness of the latches. They are rubber and the stiffness can vary. How much depends on the manufacture's quality control. Stiffer latches=less chance of hood flutter
2. Wind patterns where you drive+speed effects the forces on the hood.
3. Weight of your hood will affect the response to the forces
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Old 03-13-2014, 11:01 AM   #26
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Rampage hood locks on ours. No hood flutter and no one can just walk up to it, easily open the hood and mess with anything under there.

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Old 03-13-2014, 04:31 PM   #27
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^^^Great idea!!!!!
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Old 03-13-2014, 07:30 PM   #28
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When driving through high winds in my 09', the dang hood IMO don't just flutter, but seems to wanna pull right off the Jeep!

Since I'm in a desert State, I make sure the latches are coated with 303 Aerospace Protectent to keep the rubber pliable. Plan on doing the same with the new Jeep's hood latch.

But these solid mount ones do look good!


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Old 03-13-2014, 09:45 PM   #29
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Get the day star replacement rubbers quick install only $25 bucks and no more hood flutter
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Old 03-14-2014, 05:34 AM   #30
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Get the day star replacement rubbers quick install only $25 bucks and no more hood flutter

Thanks for the tip!

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