# Rattling/Buzzing From Back When Decel?!
**URL:** https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808
**Category:** SON240sx Automotive
**Created:** [December 14, 2007, 5:49am UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808 "2007-12-14T05:49:57Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@RED\_LINE](https://forums.speedlife.net/u/RED_LINE)
#### Post date: [December 14, 2007, 5:49am UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/1 "2007-12-14T05:49:57Z")
Heyy guys I’m just wondering what’s causing a rattling or buzzing noise whenever I decel, not noticeable until I decel from 1 - 4 around 2500rpm,
I don’t think it should be making the noise cuz I know where the proper shift points are.
hmm, the diff? the bearings?
besides that, it’s running fine as usual.
…haha, need to switch to VSLD
as soon as I can, not a fan of this open diff, but still driftable in snow xD
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### Author:  [@s1495](https://forums.speedlife.net/u/s1495)
#### Post date: [December 15, 2007, 2:37pm UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/2 "2007-12-15T14:37:54Z")
Raise car… start car @ keep at 2100-2500 rpm until u get buzzing… get someone with a long broom stick to push on the heat shields laying on top of your stock exhaust … on the cat and the second heat shield after the cat… see if rattling / buzzing stops…
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### Author:  [@CrypticNissan](https://forums.speedlife.net/u/CrypticNissan)
#### Post date: [December 16, 2007, 7:39am UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/3 "2007-12-16T07:39:48Z")
im not fond of this idea… to dangerous… just get under and grab the sheild and shake it… if it moves then fix it… could be a bad cat aswell…
is it like a “Bling ding ding” noise? if so then its ur cat full of shit and the back pressure is pumping it around real good(new cat and your good)
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### Author:  [@RED\_LINE](https://forums.speedlife.net/u/RED_LINE)
#### Post date: [December 17, 2007, 9:59am UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/4 "2007-12-17T09:59:29Z")
no blings or dings of any sort, just the sound of buzzing from deceling…
I don’t notice it all the time…otherwise the cars running good.
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### Author:  [@G-E](https://forums.speedlife.net/u/G-E)
#### Post date: [December 18, 2007, 3:49pm UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/5 "2007-12-18T15:49:46Z")
get it jacked up and run the car in mid-air, if you hear the noise again at least you can track it down to a location, however it could be equally revealing if it didn’t make any noise in the air
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### Author:  [@fastback240](https://forums.speedlife.net/u/fastback240)
#### Post date: [December 18, 2007, 4:02pm UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/6 "2007-12-18T16:02:02Z")
yeah check heatshilds or do what i do and turn the music up
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### Author:  [@RED\_LINE](https://forums.speedlife.net/u/RED_LINE)
#### Post date: [December 20, 2007, 8:43am UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/7 "2007-12-20T08:43:44Z")
^ lol, it might just be the heat shields eh…
& yes bro, I do enjoy muting it out with some music 😉
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### Author:  [@DarkManX](https://forums.speedlife.net/u/DarkManX)
#### Post date: [December 20, 2007, 4:12pm UTC](https://forums.speedlife.net/t/rattling-buzzing-from-back-when-decel/111808/8 "2007-12-20T16:12:54Z")
i had the same problem, i just torched my upper manifold heatshield off. i couldnt take it ne more.