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Old Jun 9, 2008 | 03:20 PM
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Default Small Clatter

I have a 1999 corvette c-5 and it has 40000 miles on it, basically stock except for a K&N filter (which I recently re oiled two months ago) and I use royal purple in the engine (5w-30). Under a light load, the kind you feel when you want a bump to get you into traffic faster but not enought to kick it down into a different gear. I hear a light clatter for about a second, then it disappears. It only happens under load not when the car is in neutral. Of course I usually have the radio on so I did not notice it until I was driving with it off so I am unsure as to how long it has been happening. I live in Arizona, could this be because of the hear and the weight of the oil. It is an automatic transmission and I did recently have The Wynnes fluid transfer done. Any ideas would be appreciated. Thanks

Zach

Last edited by ZAXVETTE; Jun 9, 2008 at 03:30 PM.
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Old Jun 9, 2008 | 03:27 PM
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BlackZ06
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What the hell is a "cladder" .....

What the hell is "Wynnes fluid transfer" .....

I'm gonna guess you mean a "clatter" on the first one .... I have no freakin' idea what a "Wynnes fluid transfer" is ..... ??????????????

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Old Jun 9, 2008 | 03:30 PM
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Sorry I did mean clatter,"Wynnes" never seen it spelled, is the transmission fluid exchange system that changes 95 percent of the fluid in your transmission.
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Old Jun 9, 2008 | 04:44 PM
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Could be knock. Several things to try. Do a Seafoam treatment. Try a different source for gas. Have it checked out by a good tuner.
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Old Jun 9, 2008 | 04:48 PM
  #5  
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What octane are you using

Less than 91 at AZ temperatures will probably mean pinging.
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Old Jun 9, 2008 | 04:56 PM
  #6  
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I use 91 on my vette but this last fill up was circle K gas....What about a mass air flow sensor?
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Old Jun 9, 2008 | 06:18 PM
  #7  
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Could be piston slap, go to

pistonslap.com
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Old Jun 9, 2008 | 06:24 PM
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Could it be that regular "sewing machine" sound the valve train makes?
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