Hi Guys,
This is very frustrating! I've taken the car to the shop twice and both times it stopped making the noise on the way. I was starting to think I was delusional but my girlfriend was with me when it did it the other day. I don't have the best hearing anyway, but she hears everything.
It sounds like the exhaust system is bumping the bottom of the car, but it's not because I wiggled it and it doesn't hit the car.
It makes a clanking sound that has a frequecy and a variable volumn/intensity. It starts out loud and then as you drive away if gets softer and faster and you can't hear it at speed. The freqency is about two clacks per second and increases as the car goes faster to the point where I can't distinguish individual pulses of noise.
When decelerating it makes the noise, and gets louder as the speed comes down. It doesn't make it stopped at idle.
It doesn't make it stoped at idle in neutral revving the engine.
It does it for about 30 miles of driving, and then stops for a week or so. Each time it stoped, 3 times so far, I guessed whatever was causing it fell off, or something.
Any ideas what may be causing this?
Thanks,
a