Three weeks ago I got my transmission fluid changed. A week later the car couldn't even go over 45 miles per hour and the exhaust is making crazy sound. The Acura dealer informs me that my catalytic converter needs to be replaced. This morning I receive a call and the service guy inform me that my catalytic converter was clog and that they found pieces of the valve guide in the catalytic converter. At this point the service guide doesn’t know what could be possibly wrong with my car. The only thing he can do now is remove the cylinder head. Has anyone experience this problem?