Could you say why you need to change the fluid?
The transmission should have the - allegedly - filled for life stuff in it, while the stuff in the Diff will have been changed as part of the RIS.
The transmission is filled with this stuff:
https://www.bimmerworld.com/Fluids/D...d-1-Liter.html
The Diff is filled with this stuff:
https://www.bmwautodalys.lt/en/catal...gear-oil-msp-a