Thank you Shawn! Good to hear from you!

Thank you sir! The advice is noted :)

There is a temp sensor in the actuator on the ATC300, but I’m assuming it’s more for the DC motor than the fluid temp. My guess is they do some thermal modeling to use that as a part of the control algorithm/limits. Part of what I need to figure out is a balance of responsiveness vs longevity as well…BMW is designing this for 100k miles of daily use, while the application of offroading/rallying (something I want to do with this car as well!) might change up the goals for how its controlled on this project.

@@AdamPE21 I used to work for an OEM doing CFD for transmissions/drive lines. They will size the clutches for a predicted heatload, but from my experience the duty cycles they use are for basic driving, so the clutches are probably locked/open most of the time. If you're constantly playing around with the torque split it's going to slip a lot more and heat up/wear down those clutches faster. From what I understand Xdelete does this for the e90 sport/snow modes, and they warn against using it for prolonged periods. I'm just curious to see where the oil temp gets to during normal driving compared to a frequently actuating transfer case. And really it's clutch temperature you have to worry about, I could go on forever about oil distribution...but one issue I always dealt with is you don't get enough oil dumping on the clutches and they overheat.