Once again there is a noise coming from underneath my max. When taking off there is a rattling sound until it swithches to 2 gear, this also happens if in park while racing the engine. A friend of mine seems to believe its my cat converter. Any other opinons??

 

go under the car with a rubber mallet and tap everything on the exhaust and see if any nuts/bolts are loose or rusted.

 

there is a good chance it is your heat sheild that covers your cat. when it comes loose, it rattles under certain throttle vibration. go to a muffler shop and they can weld it tight again for free or $5.

 

Thanks guys!!!

 

no prob. if it is your heat sheild, which i'm positive it is, ask them to take it off so it doesn't come loose again. you don't really need it....it's just for protective purposes if you run over somebody or something...but if you run over somebody, you got different problems...

 

Maybe thats what knocked it loose

 

Actually, you don't want to park over anything flamable when the cat is hot without a heat shield. Things like spilled gas/oil (it'd have to be a significant amount, but hey), or out here in California, dried grass. Just think of how many fires have started from a cop sitting on the side of the road with his car running (catalytic converters used to not come with heatsheilds). He takes off after a speeder and leaves a little fire behind...

 

This is seriously true.