Update : Good news so far! I got the car back today, they said after testing the transmission with some type of paint to see where it leaks (which was supposed to be done in the first place 6 months ago, I guess). They saw the leakage was between torque converter and the pump thru some sort of shaft? They replaced the torque converter and the pump all together (Shaft as well, or its just attached to the pump). Today I drove the car for couple of hours and no problems! So I am about the believe that its done..

Thanks again for the input from everybody..

Ozzie..

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X5 4.4 01