Gen 3 - Cargo area "booming"

[All-Terrain]

Noticed that my '06 can be a little boomy at the rear, when going over certain bumps. I have seen this mentioned by others on this forum, too. Has anyone addressed it successfully?

Maybe some additional sound deading, like Dynamat or similar materials, could be added under the carpeting in back?

Any thoughts?

Thanks!

 

[montypower]

Doesn't sound normal. Need to source if the sound is inside or outside.

 

[Toasty]

Is your spare tight?

 

[All-Terrain]

Doesn't sound normal. Need to source if the sound is inside or outside.

Example - see first post:

http://www.4x4wire.com/forums/showflat.php?Cat=0&Number=1290969&page=0&fpart=all&vc=1

 

[earljuic3]

I am running cooper st/maxx 285/75/16 with OME HD suspension and my truck is LOUD, I also get a booming from rear when going over bumps and such. Have been all through inside and out and can find no issues, unless someone can show me otherwise I think it's a compromise you have to make for running that type of setup on these rigs


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[grox]

I've been driving my new-to-me Gen3 for a couple weeks and the "booming" is driving me nuts. Thought maybe it was just my tires.

 

[All-Terrain]

I have used Dynamat in other cars to dampen the sound of vibrating sheet metal. If we can figure out which part of the truck is making the noise, I'll see if I can get some Dynamat and get it installed in the offending area... guinea pig it for you guys.

 

[Toasty]

I am running cooper st/maxx 285/75/16 with OME HD suspension and my truck is LOUD, I also get a booming from rear when going over bumps and such. Have been all through inside and out and can find no issues, unless someone can show me otherwise I think it's a compromise you have to make for running that type of setup on these rigs


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do you have spring isolators still?

 

[All-Terrain]

do you have spring isolators still?

Now that is a damn good question. You're right. A lot of cars never had these removed after being imported. I'm going to check mine tomorrow.

 

[earljuic3]

Can someone help me with what to look for? I had my OME stuff installed by a shop...

 

[All-Terrain]

Can someone help me with what to look for? I had my OME stuff installed by a shop...

I don't know what's causing it on our trucks... but booming noises like these often come from flat metal panels that have little or no bracing behind them, vibrating and resonating as the vehicle moves over surface irregularities. So it's possible that behind the carpeting in the rear cargo area, or maybe near the wheel wells, or in the cavity where the 3rd row seats are stored, there is an area of sheet metal that is causing that noise.

Dynamat and other sound deadening materials act to provide some support and absorption, to redistribute that energy and deaden the noise. It's very effective, especially if you use the thicker stuff, although it can't cancel out noise completely because some of it comes from tires, door/window seals, etc. But I'm sure we can find a way to reduce it. I'd like to.

 

[montypower]

I know what your problem is... Simple really.

Rear OME shocks have the wrong size bushing (lower control arm mount). So you have a ton of play and they will bang around. I removed the metal sleeve from the factory shock and put it inside the OME bushing for a tight fit. I couldn't believe they would sell it like that.

 

[earljuic3]

@montypower this makes sense to me based off the noise I have going on...unfortunately my stock components were toast so I didn't keep them, is there a Mitsu part number for that sleeve?

 

[nnamssorxela]

Interesting. It is very easy to drop that shock and check to see if you have any play. I installed OME suspension a few weeks ago and noticed that I did not have any wiggle room. Also, I had no booming sound either before or after the OME installation. I installed the original rubber spring pads when I did the OME as well.

 

[earljuic3]

My boom didn't start until about 3 months after lift.