I BOUGHT MY TITAN NEW AND ONLY FOUND OUT ABOUT FOUR MONTHS AGO THAT I HAVE BEEN DRIVING MY TRUCK FOR NEARLY TWO YEARS IN 4TH GEAR. I THOUGHT THAT 4D WAS THE SAME THING:bangit:. KIND OF FUNNY AND STUPID.......IM NOT ONE TO READ INSTRUCTIONS OR OWNERS MANUALS :read:UNTIL I COME ACROSS A PROBLEM:)...