I recently bought an F250 SD to tow a four place snowmobile trailer. I've been hearing a click whenever going from forward to reverse or vice versa with the truck in 2wd. Also hear the click at times when switching lanes or turning. It has the electronic shift on the fly, not planning on doing offroading with the truck it seemed to be a good idea to be able to click it on when the snow conditions called for it. When I turn the control **** to 4wd h I hear something happening but the manual locks that you'd normally turn by hand don't move. In the electronic mode, are they suppose to move? Snow's a flying up north and the sleddin fever's got me so bad I need to get this straightened out.