What does this button do???file:///C:/DOCUME%7E1/WILLIA%7E1.RUI/LOCALS%7E1/Temp/moz-screenshot-1.jpg

http://i151.photobucket.com/albums/s146/williamruiter/untitled.jpgfile:///C:/DOCUME%7E1/WILLIA%7E1.RUI/LOCALS%7E1/Temp/moz-screenshot.jpg

that is your over drive switch!!!!!!!!!!!!!!!!!!!! it keeps you from upshifting into your overdrive when you are pulling a trailer....