Well 2 different mechanics have looked at the whining/squealing noise, they both concluded it is coming from the transmission. One of them rekons it is from the TQ converter, the other mechanic rekons it is from inside the transmission.
The second mechanic gave a call to a local auto trans specialist to describe this whining noise on my Z, and that specialist suggested it maybe burnt/damaged clutch plate or band material clogging up the trans fluid filter or pump. This specialist suggested to the workshop to remove trans oil pan and clean it up and check if the noise goes away. So they did this, the noise was still there for about 1/2 hour of driving.
The whining noise went away for about another 1-2 hrs of driving and then comes back. Strangely after this, the car does not feel like it is slipping anymore, actually it feels extremly smooth and responsive to drive, almost more than ever!
I don't get it, the noise has come back permanantly by the sounds of it, but the car is driving beautifuly in all 7 gears it seems.
Now I cannot decide if there is transmission damage or not. Anyhow, I guess I will just have to have the transmission specialist to look at it, don't want to spend 6K in a rebuild if I don't have to.
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