What do the plus and minus signs next to the D gear in an automatic transmission mean?

[DeAdeline]

D gear next to the plus and minus is the manual mode in the automatic transmission. The so-called manual mode is to add an electronic control device to the automatic transmission, so that the transmission will follow the operator's instructions to shift up and down. When the gear lever is in the D gear state, moving it to the right will enter the manual mode. At this time, pushing it up will shift the transmission up one gear, and pushing it down will shift the transmission down one gear. The following is a related introduction: 1. Automatic transmission cars: Generally, cars that use automatic transmissions (AT) to adjust speed. When driving, the control system of the automatic transmission automatically selects the appropriate gear according to the engine speed and load, replacing the subjective judgment of the driver and the shift operation. In layman's terms, an automatic transmission car is a "foolproof car." 2. Introduction: Automatic transmission cars usually use hydraulic transmission devices to replace the mechanical clutch of manual transmission cars, so there is no clutch pedal.