My pdf chart only goes through 2002, but it shows
the V8s all have the ZF trans, while the 3.0 IL 6 has
the GM trans, as do several other species of BMWs.
Your moniker doesn't show which motor you have...
I wouldn't wring my hands over either one; I hope you
aren't spending Thanksgiving Day sweating bullets and
getting cranked over what brand of trans is in your X.
GL,mD