O/D should be used under normal driving conditions for economy. It is only when you require engine braking or need to keep from shifting when driving along curved roads that you use O/D OFF.
PWR ACT is for Power, so the gears will upshift only at a higher rpm. MAN ACT is Manual when you wish to shift from each position manually. Do not use any of these for normal driving.
Tuesday, July 1st, 2008 AT 2:10 PM