I have a 2008 Edge and usually do the normal 30 second warm up. It seems to take a few miles for the tranny to shift into 6th. I usually drive for approx 1 mile at 40mph and then enter the highway and get up to 55mph. After entering the highway and up to speed it will still take over 2 miles. I know that the transmission is still cold and it never does this when fully warmed up.
This is with an outside temp of 20-25F.
Is this considered normal.