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Muffler rattle in low gears?

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Old 02-15-2008, 11:03 AM   #1
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Muffler rattle in low gears?

Since I have had my truck, a total of almost 2 months, everyone in a while I notice a quite audible rattle coming from the rear passenger side of the truck. This only happens when i am either gearing down, or going up from 1 to 2nd or 2nd to 3rd. It may happen in the higher gears although I cannot hear it as the engine is probably loud enough to muffle the sound. Has anyone else heard about this? I am taking the truck to toyota for the first oil change, so I can get a chance to talk with the mechanics about what problems they have seen and what toyota will fix. The service department always seems more helpful than a salesman. This problem doesnt happen all the time, maybe twice a week but when it happens it happens over and over throughout that day. Id like to have some ammo when i attack the dealer tomorrow so any info would be greatly appreciated.

Thanks
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Old 02-15-2008, 03:59 PM   #2
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Smile Muffler rattle

I get the same rattle. I thought it was a muffler or pipe tattling on the frame. My svc guy says its to far from the frame. He;s heard it and is going to investigate it at my first oil change. I ususally hear it in 2nd or 3rd at low rpm and sometimes starting off in reverse
I'll keep you posted.
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Old 02-15-2008, 04:07 PM   #3
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im going in for my oil change tomorrow so ill let you know how i make out tomorrow night.
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Old 02-15-2008, 06:03 PM   #4
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Smile

Quote:
Originally Posted by corywilson13 View Post
im going in for my oil change tomorrow so ill let you know how i make out tomorrow night.
Looking forward to your results. Whats ur weather on the west coast...we're -2C right now looking at -12C by AM

later
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Old 02-15-2008, 06:09 PM   #5
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the exhaust is all one piece from the y pipe to the tip, so i dunno what could be making a rattle...unless maybe the vibration from the engine/exhaust is making a loose spare rattle?
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Old 02-16-2008, 05:56 AM   #6
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JHodge Its to far forward to be a loose spare. Its a real 'tinny' sound. On TNation someone mentioned a cold air intake, but its plastic. On my truck it seems to be right under the pasenger seat. As with any rattle it could be originating from anywhere.
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Old 02-19-2008, 04:30 AM   #7
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So what did you find out about the sound? Was it the thin heat shield vibrating against the exhaust pipe?
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Old 02-19-2008, 04:53 PM   #8
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Dutch....That makes sense I'll check it out
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Old 02-19-2008, 10:06 PM   #9
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mine was actually some thin heat shield hitting the driveshaft boot. The weather here this morn was about -5 and got up to around 9 celcius later in the afternoon.
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Old 02-22-2008, 03:18 PM   #10
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Thx Cory and Dutch....I have it checked. It was -12c with wind chill -22c in NS this morning. Its now -4 at suppertime
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Old 02-22-2008, 06:57 PM   #11
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cat. converter heat shield maybe? That was the cause on a friends `86.
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Old 03-18-2008, 03:50 PM   #12
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Quote:
Originally Posted by tacotoe View Post
cat. converter heat shield maybe? That was the cause on a friends `86.
Seems in my case its the fender end of the cold air intake. A new one is on order.I recreated the noise, my tech held the plastic intake and I could not get the sound to comeback
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