I have not noticed any functional or performance change. I believe it is only a name change by prepending "Constant" on my T8. This seemed to have been implemented in the Oct 2018 +/- timeframe. My update occurred in Nov.After my dealer updated my software last week, I noticed that the AWD drive mode is now called Constant AWD. I wonder why, and does it affect performance?
That matches with my experience with the AWD mode, works quite well in balancing delivered torque to the axles when at low and moderate speeds. Sounds like just a rename.Constant AWD mode
activates all-wheel drive to increase traction and sets Electronic Stability Control to Sport mode. It is designed for use mainly at lower speeds in slippery driving conditions such as ice and snow. AWD is constantly available, even when the battery charge is depleted. This mode reduces fuel economy.
On a T8, I understand that is true for Hybrid mode.I believe Volvos are front wheel drive until wheel spin is detected, which will activate all wheel drive