This may be of use.
https://www.xhpflashtool.com/blog/co...m_gm_to_zf6hp/
For my swap on my 06 330xi (6HP19), I'll be using a 6HP19TU (6HP21) from an 10/07 335xi. I can't wait remember the HW# off the top of my head. I then bought a separate torque converter from an 07 E60 (not sure if 535 or 530) with transmission part HW 7573661, which is to be compatible with the N52 according to the link I posted above. Main reasons being I wanted a straightforward swap with as little surprises as possible and as cheap as possible. That eliminated the 8HP and DCT. Couldn't find an LCI 530 trans for the life of me. Got the 60k mile 335xi trans for $400, torque converter for $175. Unfortunately not much info on the TC. It was the only one I could find with that HW number and matching splines. It looked to be good condition so I'm not sweating it. Might sell the tc from the 335 or keep it as a backup.
Cool thing is the 2nd gen is more tuneable than the 1st gen. To get xHP to have the correct maps for the 330 with the new trans, coding the DME/CAS/TCU with a vin of an N52 E9X w/ the 2nd gen trans is necessary. I found a proper vin from an EU car. Will have xHP swap my old vin from my account for the new one once everything is good to go. Finally after that I'll see if Rod Sutphin can help me out with a custom tune. Going down the rabbit hole and see how smooth I can get D mode and how sporty I can get sport mode..
Having the guy who's replacing my engine do my trans swap as well so he'll be undertaking everything but it should be fun. I'll update yall as much as I can. With that being said my 1st gen will be up for sale once everything is complete
