Then non x-drive transfer cases use ATF, if I recall correctly, and the open diffs use straight 75 90 gear oil, without any slip additive ideally. Not as common these days, but Liqui Moly makes it.

In truth I’m not sure the slip additive would matter in the older open diffs as there is nothing to slip in the diff anyway.

Check on the ATF type tho….i think I used Dexteon III last time, but don’t recall.

Edit: thanks Wpoll!

Get a cheap pump for the diff.

__________________
Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee