Originally Posted by phunk

I have been full throttle shifting my 370 since the day I got it from the dealer. I used to not do it quite as often because it used to make a clunk noise when I did. The noise eventually went away. I believe that the clunk was from the 2-piece flywheel bottoming out. I believe the noise was gone after doing my turbo and clutch etc install. I cannot think of anything else I changed out that could have been making that noise. If you are not familiar with the VQ flywheel... The flywheels friction plate is suspended by springs.

Perhaps your description matches the clunk I was getting.