Senator B 3.0 24 V automatic gear swap-which fits???

Hello guys! We’ve bought ten Seni with automatic 3.0 24 V BJ.91, our first automatic, so we’re still asking ourselves a little stupid and inexperienced, so sorry, for the stupid questions that come now !!!! After 12 pages forum search here still the biggest unanswered question: Ööhm, we have an automatic transmission of an Omega-A 2,6 lying around in the Wörkstatt. That should be in the Senator, which according to the previous owner has a gear damage (no longer peels, gear leaks) t. After the forum search and all the technical descriptions (help??Nix understood…AR35 or AR25) we are not so sure whether this fits in the Seni as planned.And before we start a huge stupidity, I think, I’d rather ask Saublöde.