"Overdrive" refers to a state of working very fast or very hard, often beyond normal limits. It can also describe a gear in a vehicle that allows it to move at a higher speed with less effort from the engine. Full definition
The engines are mated to either a close - ratio six - speed manual transmission or an electronically - controlled five - speed automatic with overdrive ratios for the top two gears. (topspeed.com)
Theory - crafting went into overdrive with all the frame analyzing that the release of such a trailer demands. (rdr2.com)
This refers to our ability to calm ourselves down when our nervous system is in overdrive as well as to get ourselves going when we are in a slump. (mindbodygreen.com)