Assuming a F2 from your signature, you need to use the correct spec fluid - CHF202. You can easily cause damage to the power steering pump otherwise.
Edit; And be sure to bleed it correctly if required - before starting it. They are very prone...
but here in Bulgaria there is no one that will pay this amount of money for this car..........
Mate no-one world wide is going to pay that for it.
I hope you didnt built it from a shed load of britpart parts, we all know if it turns up in a...
You’ve checked there is nothing stuck in the tyre…?
Edit; how certain are you that it is that wheel? Noises from underneath can be misleading as to which corner there are coming from (if indeed a corner at all… prop?)
Assuming all model years are the same (I believe they are), the rear driveshaft nuts on an F2 are 395Nm, or 291 lbf-ft.
And you should use a new nut 😉
You still need a big torque wrench.