fluttering type noise
 

what could cause a fluttering noise with rpm...sounds similar to an exhaust leak but signs point elsewhere. it sounds like its coming from the trans bellhousing area. would loose TC bolts cause a noise like that?

Do you have AIR injection? Maybe the tube that runs into the cat broke off and you hear the air pulsing out of it?
Just a quick check and you'll know if that's it or not.

yea i do have it...but its on the cat...if by chance thats all it is...id be happy.