Automobile manual gear is generally five forward gears and one reverse gear. The previous cars were 4 + 1. Now some high-end cars such as Mazda 6 have six forward gears and one reverse gear manually. The more gears, the more flexible the speed control will be. At the same time, it will give full play to the power of the car, so it is more fuel-efficient.
Auto gear is a transmission that makes you feel very simple to drive a car. Generally speaking, the words P, R, N, D, 1, 2, 3, etc. will be displayed in the gear on the car. P is the unit parking gear, n refers to neutral gear, D refers to the normal gear forward, and 1, 2, 3 is also the forward gear, but the difference is that the larger the number, the greater the torque, in other words, when the car is full of people, Moreover, you have to climb a very steep slope. You only use 3 when starting. Generally, D is OK. In fact, automatic gear also has gears, including 4 front or 5 forward + 1 reverse. Unlike manual, it only changes according to the speed.