I can't find BMW differential fluid but found that Land Rover's # LRN 7591 is supposedly the correct (for BMW 4.4 non-slip differentials) 75w-90 GL5 Fully Synthetic SAF-XO spec.

Is the front and rear fluid the same? From researching, I was led to believe that they may differ but found nothing concrete.

Can any of the experts here confirm this before I do the fluid replacement?

Thanks, Xperts.