Why is there a strange noise when stepping on the brake in P gear of an automatic transmission?

1 Answers
OMakayla
07/29/25 5:29pm
There are three reasons for the strange noise when stepping on the brake in P gear of an automatic transmission: 1. The sound of the gear lock. When you step on the brake, the gear unlocks, and you will hear a click. 2. Parking in P gear without engaging the handbrake. If parked on a slope, the car will still move forward or backward until the parking lock pawl locks the car. After locking, the vehicle's braking relies on the pawl lock. When the vehicle needs to move out of P gear, the pawl lock is first released, and the sound you hear is the unlocking sound. The correct parking method is: step on the brake to stop - engage the handbrake - release the foot brake - shift into P gear after the car is completely stationary. 3. The steel back length of the brake pads has a deviation. You can step on the brake, shift into drive gear, then shift into reverse gear, move the car slightly, and then shift back into drive gear to see if the noise occurs every time. If it does, the brake pad gap is too large. Of course, you should also check the rear brake system to ensure all bolts are properly installed and tightened.
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