Why is there a strange noise when shifting into P gear?
3 Answers
Shifting into P gear with a strange noise is the sound of gear engagement, which is a normal phenomenon. Here are some introductions about P gear: 1. The "P" in P gear comes from the first letter of the English word Park, so in the gear positions of automatic transmission cars, P gear is the identifier for the parking gear. 2. P gear is a gear evolved from N gear. In addition to putting the transmission into neutral mode, it also has a pawl inside the transmission that locks the gear on the output shaft to form a mechanical lock, thereby securing the drive axle to fix the vehicle in a stationary or slightly moving state.
After driving for a long time, I've noticed that the clicking sound when shifting into P gear is quite common. Often, it happens when we rush to shift gears before the car comes to a complete stop, with the vehicle still slightly moving, causing the parking pawl and gear teeth to collide and make noise. Additionally, as the car ages, transmission components may wear out, such as increased clearance in the parking pawl or bushings, resulting in unusual sounds with each engagement. I recommend developing a good habit when parking: fully apply the brakes, pull the handbrake tight, wait a few seconds, and then shift into P gear to reduce noise. If the sound is loud and accompanied by vibrations, it might indicate deteriorated or insufficient transmission fluid. Check the fluid level and condition promptly to prevent further damage to internal components. In summary, minor sounds are usually not a big issue, but persistent abnormalities shouldn't be ignored—safety first.
As someone who frequently tinkers with cars, I understand that unusual noises when shifting into Park (P) are often caused by mechanical components. The parking pawl engages with the lock ring gear to secure the vehicle. If the car isn't completely stationary or slides slightly on a slope, the impact can produce a sound. Normally, the noise is minor, but if accompanied by a sticking sensation, it might indicate gear wear or insufficient lubrication—check if the transmission fluid has aged and turned black. From my experience handling such issues, regular fluid changes and avoiding shifting directly into P on steep slopes can prevent these noises. Remember: always engage the handbrake first to cushion the shift into P, extending component lifespan. If the noise suddenly becomes louder or more frequent, don't hesitate—seek professional diagnosis to prevent potentially costlier issues.
