Franchise agreements. Franchisors and franchisees are required to comply with the Franchising Code of Conduct. The Code applies to conduct occurring on or after 1 January 2015 in relation to all franchise agreements entered into, transferred, renewed or extended on or after 1 October 1998.
Generally speaking, overdrive is the highest gear in the transmission. Overdrive allows the engine to operate at a lower RPM for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway.
When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [40-45 mph or more] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. Overdrive should usually be selected when the average speed is above 70 km/h (40-45 mph).