That button is factory. O/D OFF. Turns off O/D when towing, hauling heavy loads, eliminates exessive shifting according to the book.B10alia said:You might be best off taking the column apart and just putting a junkyard shifter in. Every Chrysler I've driven has a metal "stick" with the plastic tip like you noted. Just out of curiosity, why do you need the O/D button? Most of the time, you're better off just leaving O/D engaged unless the transmission is hunting, like on grades with a trailer.