It has been my experience that with most trucks, not all, when you select 2nd with the shifter in an AT it stays in 2nd will not shift up or down. I have a 6.0 PSD with the 5 speed AT and when you select 2nd it will not leave 2nd, same is true when you select 3rd from a dead stop you start out in 3rd.

Sorry for the 2 posts... I am at work and the editing is not working and then I hit the browser back button... computer locked up... :cursin: I will try and the first one tonight when I get home and am on a decent computer:shrug:

That's the way it is on Fords. On GMs you'll often find that when you select 2 or 3, that's simply the highest gear you'll go. The vehicle will still start in 1st gear. Of course, this may be different on the very late model vehicles, but that's how I remember it.