My 2021 HRV is the first AWD I have owned so it does require the rear Dif. fluid to be changed also..
Same as my Ridgeline.
Thats either VTM4 or Dual Pump II Fluid. (boy is that fun thread)
Not sure if they function the same, but if so its a super AWD system, right up there with the audis and haldexes.