Trans Fluid Fill Procedure Question (Not the Usual Ones)

[crystalworks]

This is slightly non-X5, but the info will pertain to our E53's as well. Not that anyone would probably be in this situation as there is plenty of room to work on the X5's. Okay, so I am working on an E61 xdrive 530 at the moment. The packaging on it is TIGHT. Like REALLY tight. So I had to drop the exhaust to do the guibo, change the Xfer case fluid, CSB on the driveshaft, and trans/xfer case mount bushing. Question: can I run the engine with the driveshafts disconnected and row through the gears to do the fluid change? DSC switched off obviously. Will the computer freak out? And/or is this bad for the trans or Xfer case? Caveat, this is a pre-lci 5er so it still has the mechanical shifter. If it had the electric one I don't think this would work due to the computer not sensing any wheel speeds and send it into neutral automatically?

Why ask this you wonder? Because of the aforementioned packaging the fluid fill will be infinitely easier with the other stuff out of the way. The fill plug is on the back of the trans FACING the xfer case! WHY?! Why you do this BMW? With the Xfer case bushing out and the trans supported on a stand I have a straight shot to the fill plug.

Thank you to the collective for any infos.