Help! Can't Engage Gears When Engine Running

[46n2]

Hi,

Having problems with my GTST, and can't engage gears when the engine is running.

History:

- Clutch is a modified Exedy heavy duty organic face clutch from Northern Clutch in Brisbane (bought a while/years ago) with a heavier pressure plate (~2800lb from memory).

- Suspect the clutch was incorrectly adjusted when put in by workshop (wouldn't completely disengage until I made adjustments at the pedal - Couldn't go smoothly into 1 & R. Fine after adjusted).

- I think the previous step may have caused the Throw bearing to wear prematurely (started making noises only a few months after clutch was put in bbut i was too lazy to go back and get it checked out.

The Problem:

- Problem happened when slowing down to lights from 4th to 2nd (low revs, nothing silly). wouldn't go into 2nd at all

- Just prior something felt a bit odd upshifting (like it didn't engage properly? but no noises)

- There is a squeaking noise from under the car when the clutch is pressed

- Clutch master cylinder replaced recently enough (maybe 20K ago???)

Troubleshooting:

- Gears can be selected when the engine is not running

- Can grab gear with engine running when car is rolling (2nd @ ~15kph?) - this is how we managed to drive home.

- Pedal was a little lighter than usual for the last week or two

- Fluid had moved down to half way in the clutch master reservoir (i'm guessing slowly over the last few months maybe?).

- Filled the reservior to full marker and tested again - no joy

- Checked for leaks - nothing visible at master or slave. No drops of anything under the car

- Bled the Clutch at the master and tested again - same

- Checked slave cylinder is pushing the release fork when the clutch is pressed - Seems OK

- Replaced the slave cylinder anyway with a new one (Nissan Gen)

- Flushed fluid and filled with new fluid.

- Bled again and pedal regained it's firm feel

- Started car and tried again to engage gear - same problem, won't select any gear

Added Problems:

- After replacing the Slave Cylinder and bleeding there is a vibration through the clutch pedal, and makes a strange noise which changes as the clutch pedal is pressed , and is different to the noise the throw out bearing was previously making. a bad sounding noise

I had a look here to try and get my head around what could be going on. The animation showing how the release fork interacts with the rest of the clutch makes me think that there may be something going bad with the throw out bearing, and the way it pushes on the pressure plate. But then again, everyone that 've spoken to about the throw out bearing has told me that they've never seen a worn bearing cause any problems other than an annoying noise.

Congratulations! you've reached the end of my novel....it was Professor Plum in the Dining Room with the revolver

Please help!!! this makes 3 cars off the road all at once now

Cheers,

Michael