metal rattling sound from the back

jhlscut

New member
I just bought a used 04 4runner. It is a v8 limited edition. There is a constant metal rattling sound from the back. When it runs a very low speed, there is no noise, but as soon as it picks up speed, the noise becomes louder and constant. I check the tools, the hatch, the spare tyre, license plate, towing part. Nothing is loose. It sound like a thin metal piece rattling. Any suggestion?
 
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Mine had a rattle when I bought it too. I had to get in the back and have my wife drive around while I listened and pushed on things. In my case it was the trim on the lift gate itself. If I put pressure on it just left of the small access panel the noise stopped.

I balled up a clean shop towel and put it between the trim and actual lift gate. As redneck as that is the rattle stopped and nobody but me knows there is a towel putting counter pressure on the trim piece.
 
Get in the back and have somebody drive the truck. It'll be immediately obvious where the sound is coming from. I don't think my wife drove 100 feet before I had it pinpointed but I drove around for a few weeks prior completely unable to figure out where it was coming from.
 
Get in the back and have somebody drive the truck. It'll be immediately obvious where the sound is coming from. I don't think my wife drove 100 feet before I had it pinpointed but I drove around for a few weeks prior completely unable to figure out where it was coming from.

Thanks! Will do.
 
I think he means the special adapter that you have to use to remove the one lug on each wheel that you can't just use a wrench on.
 
I think he means the special adapter that you have to use to remove the one lug on each wheel that you can't just use a wrench on.

Since I don't have one to drive so I can get in the back to listen. I keep the lift gate open and drive it around. the noise is still there. Might be some other reason than the lift gate.
 
Rather stupid question... but did you actually take the license plate off to verify that isn't the issue?

Actually. I thought the same way at first. The license plate was loosely fastened. But it isn't the reason. I replaced it with the temp plate real tight. Nothing changed.
 
Rather stupid question... but did you actually take the license plate off to verify that isn't the issue?

I tried my best to shake the rear of my 4runner for a while. There was no sound. I suspect the noise is a real mechanic problem with some running part. I will check if some nut has fallen into somewhere tomorrow in daylight.
 
I assume you removed your cargo cover, if equipped, and ruled that out? Could be your amp/sub setup on the passenger side back there. My stock amp is knocking around because I forgot to put two screws back in it and I've been too lazy to remove the panel again and fix it.
 
I assume you removed your cargo cover, if equipped, and ruled that out? Could be your amp/sub setup on the passenger side back there. My stock amp is knocking around because I forgot to put two screws back in it and I've been too lazy to remove the panel again and fix it.

Thanks. I have a double deck instead of a cargo cover.
 
I spend two good hours today, but still no clue. I will get someone to drive it around with me in the back.

Where is heat shield located? Above the exhaust pipe?

yup there are heat shields bolted to the floor all the way back...
also check the ones around the cat... had to remove one of those on my wife's cause it has rattled loose.
 
yup there are heat shields bolted to the floor all the way back...
also check the ones around the cat... had to remove one of those on my wife's cause it has rattled loose.

I crawled under today and found it was the heat shield. there is the biggest piece falling on the muffler. there are four big holes in the shield where bolts are supposed to fasten it to the body.

Thanks to NuclearN8. I think that is it. Thanks to everybody who offered help.
 
yup there are heat shields bolted to the floor all the way back...
also check the ones around the cat... had to remove one of those on my wife's cause it has rattled loose.

How did you bolt it to the floor? It seems difficult without taking the pipe and the muffler off first.
 

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