I am starting my look for a transmission for my 08 3.0. The transmission was verified as a 6hp21x. Looking through different part sources online list it as a 6hp26. I am a little confused as what route I should be going. Are they interchangable or does the transmission have to be from the e70. Any info would be great. Ive tried searching but 20+ pages of results and i didnt fine much info.

With the understanding i would need to either change met unit or coding but keeping it out of the conversation for now.