Hi all: 2005 5.9 2500. The shift indicator is dancing between D and 2 while rolling and downshifting/upshifting uncommanded. Sometimes I can't get it into park position on the indicator, so when I open the door the horn goes off. When it stays still in drive while rolling the trans is shifting normally etc,, but then it starts downshifting into 2nd and dances between D and 2. Moving the shifter around doesn't seem to make any difference . . . any insights would be appreciated.