I used to have a bad vibration/rattle at low revs when pulling away. And also a bit of vibration at higher speeds.

 

I have personally fitted:

- 4 new wheels, all balanced,

- Nismo gearbox mount

- new Centre Bearing. (The prop was replaced exactly as found.)

 

The top end vibration has gone, but the 'pulling away' noisy bloody rattle remains.

 

It cant be the prop as i'm vibration free all the way up the speed range, just this massive rattle on low revs torque. (i.e. you are moving at speeds where you really should be in 1st but stay in 2nd).

 

Another thing that leads me to the flywheel being warped is that even after a new (well 2nd hand good one, I dont think Legrath would sell me a bad one!) starter motor I still have grinding trouble starting when cold (the motor doesnt fully engage the ring-gear). The ring-gear teeth are showing signs of wear from this but not enough to stop the motor engaging, yet.

 

 

 

I have had f*cked clutch suggested, and a good search on here has thrown up mention of warped flywheel. If anyone would be kind enough you can have a test drive at Silverstone and see what you think?

Do you feel any movement through the clutch peddle, or does the clutch grab? And are you getting a chattering from the clutch?

 

Clutch plate could be warped or contaminated or there could be wear on the splines even slight movement of the shaft, but usually with a warped flywheel you will get clutch grab as the clutch plate isnt making a parralel contact with the flywheel same as if the clutch plate was warped.

 

If the car has over heated it can cause the flywheel tp warp too

No grabbing, but can feel it faintly through the pedal. Reckon it might even be a bearing, output or release.

 

With the aid of an assistant, the noise is coming from the front half of the car. So not the prop or diff.

 

There is a slight whine that goes when you push the pedal, but only a really quiet one, so the release bearing cant be bad, thats probably just normal gearbox noise..

http://300zx.co.uk/forums/showthread.php?t=54596&highlight=pulling+noise

 

http://300zx.co.uk/forums/showthread.php?t=70689&highlight=pulling+noise

 

Anyone find out in the end from either of these?