From what I read, coms problems, essentially you need the ECU to get the most out of it and the late model X5s have changed their coms. What has been done is transplanting the engine and keeping the RR electronics, i don't know how much X5/RR was used.
funny enough, was just reading about these - answer is 6 speed ZF, the diesels didn't get the 8...
In the E70 X5 (2007 on) the 3.0 M57TU2D30 is 2 generations after our rangie engine. The xDrive35d has a handy 210/580 in standard form. that was replaced with the xDrive40d with a nice 225/610. What would they retune to? Unfortunately this version has been discontinued

