Whining noise? Maybe a wheel bearing?
I have a similar issue in drive. In D2, if I come to a corner and brake the car is slow to kick down to 2nd. I have to wait. Not a big deal though...I'll get it looked at someday.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red