Ken NH 
2011 Nissan Frontier King Cab PRO-4X 4dr King Cab 4WD 6.1 ft. SB (4.0L 6cyl 5A)
NIssan will roll  backwards
 In July I purchased a new 2010 Nissan Frontier Pro 4X4 . With the new purchase I quickly discovered that when stopped on a hill, while in drive, the vehicle rolls backwards. It will similarly roll forward if in reverse and stopped when backing up. I now know there is a Hill start assist that allows the driver to stop on an incline, release the brake and not roll back for two seconds. But after two seconds the vehicle rolls as if in neutral and will roll backwards unimpeded. Some assist.  As effective as the Emperors New Clothes. Unaware of this assist I reported the problem to the dealership and I was told when on a hill I would have to two pedal it.