I've got the dreaded creak/groan transmission noise when shifting into reverse/drive
 

I've got a 2010 FX4 with the 6r80 trans, and lately it's been making a creaking sound when I shift from Park to reverse or drive. It's way more pronounced when I'm parked on an incline like my driveway. I know there was an old TSB for this issue, but I get nothing when I type in my VIN on the Ford site. Would this still be covered 10 years from build date? What is my next course of action? Thanks in advance.