Actually it's an automatic, I think it may be an exhaust mount or something. I got a flowmaster 50 on it. I need to get up under it and have the wife shut it off. It happens just as the engine stops turning. Sounds like something is loose and moving? I will figure it out I guess. Thought it may be something common. Thanx for the replies. If/when I figure it out I will post it. Thanx06Sport said:we just discussed this about mine. You have a 6-speed im guessing? It will only do it if you dont have the clutch pressed in and you turn it off. Press the clutch in when you shut it off and it wont do it. Dealer told me and another that it had to do with the tranny being engaged or something. When you have the clutch in you are releasing the engine from the tranny? And if you have the clutch out, you hare hearing the tranny coming to a stop also. Something to that effect.