What do the plus and minus signs in an automatic transmission mean?

[Adams]

In an automatic transmission, the plus sign represents upshifting, while the minus sign represents downshifting. Relevant information is as follows: 1. Operation: To increase the speed of the car, push the gear lever toward the plus sign to achieve an upshift. To reduce the car's speed, push the gear lever toward the minus sign and then downward to achieve a downshift. 2. Introduction: N stands for neutral. Selecting the N button disengages the transmission and disconnects it from the driven wheel. At this point, the car will move based on its own weight, momentum, and inertia, equivalent to turning off the engine. The car cannot rely on the engine for operation, so it is important to avoid using neutral when going uphill. D stands for drive, which works by engaging all the energy through the transmission to produce a forward motion ratio, typically ranging between 3 and 9.