I recently bought a 2004 350z off one of my friends and noticed that the clutch is quite stiffer and harder to push in then a normal clutch. (he claims its because of a heavy duty pressure plate that was installed from factory)

2. sometimes i hear a rattle from underneith the car when ideling and driving.. but its not rattling everytime i drive.

3. when cutting the car off it sometimes puts off a shattering noise. ( guy claims that its a bearing in somthing and that he got it checked out and they said it was normal wear)

4. the RPM tack isn't smooth when accelerating and slowing down.. kinda seems as its jumpy

anyone have any suggestions for these pest?

 

I have the same problem and I was told by a mechanic that is was just normal wear...that was almost a year ago...just today I noticed its gotten a little louder...let me know if u found out something about this dude.