What is the purpose of the automatic transmission P gear?

[BethanyLynn]

Automatic transmission P gear – Parking gear, also known as the starting gear. When the vehicle is parked and not in use, the gear is set to this position, at which point the wheels are mechanically locked to prevent rolling. More information about the automatic transmission P gear is as follows: 1. An automatic transmission uses planetary gear mechanisms to shift gears, automatically adjusting based on the degree of throttle pedal pressure and changes in vehicle speed. The driver only needs to operate the accelerator pedal to control the speed. The P gear in an automatic transmission vehicle can serve as a substitute for the handbrake, so when parking, engaging the P gear eliminates the need to pull the handbrake, even when parked on a slope. However, in reality, the P gear can indeed act as an auxiliary to the handbrake but cannot replace it. When parking an automatic transmission vehicle, the handbrake should still be used. 2. P (Parking): Used for parking, it employs a mechanical device to lock the rotating parts of the vehicle, preventing movement. When the vehicle needs to remain stationary for an extended period or before leaving the vehicle after parking, the handbrake should be engaged, and the gear lever should be pushed into the "P" position. It is important to note: the vehicle must be completely stopped before using the P gear; otherwise, the mechanical parts of the automatic transmission may be damaged. Additionally, automatic transmission vehicles are equipped with a neutral start switch, ensuring the engine can only be started in the "P" or "N" gear to prevent the vehicle from suddenly lurching forward if started in another gear by mistake.