So its winter time and getting down in the teens and below zero on some days. I jump in my trusty 4 wheel drive without a second thought I push the Auto 4WD button on the dash. My driveway is about an 1/8 mile long with a incline at the end. So I was pretty sure after the 4 inches of snow fall i would need the 4WD to get out. No problem, all was well and off to work I go. After work I hop in and start down the road and figure since the roads were clear I would just pop it back in 2WD and head on my way. The light on the dash switched from Auto to 2WD. Didn't think much of it till I turned a sharp corner and noticed the front wheels grabbing like I was still in 4WD. I took note of the outside temperature, 5 degrees, and remembered that a tech form FreeAutoMechanic.com/mechanic/forum had answered a question I asked a while back about this very issue. It turns out that when this happens if you can pull it in the garage or wait for it to warm up, everything works as it once did. And sure enough, once it warmed up outside, back to normal. Thought this would be of some use for anyone with the same issue or can't get there truck out of Four Wheel Drive.