What is the reason for the sound when stepping on the brake in P gear of an automatic transmission car?

[OliveLynn]

The reason for the sound when stepping on the brake in P gear of an automatic transmission car is: there is a locking mechanism inside the gear lever. After stepping on the brake pedal, the locking mechanism will unlock, and the sound at this time is a normal phenomenon. Introduction to automatic transmission car gears: 1. P gear is the parking gear, used for long-term parking of the vehicle; 2. R gear is the reverse gear, which is engaged when the vehicle needs to reverse; 3. N gear is the neutral gear, which is engaged when the vehicle is parked for a short time without turning off the engine; 4. D gear is the drive gear. When the gear lever is placed in D gear, the vehicle will automatically shift gears based on throttle opening and speed data; 5. S gear is the sport mode, making the vehicle drive more sportily; 6. M gear refers to the manual mode. When the gear lever is engaged in M gear, shifting is done manually by the driver; 7. L gear is the low gear.