What is the reason for the abnormal noise when stepping on the brake in D gear of the new Teana?
3 Answers
There is abnormal noise when stepping on the brake in D gear because the ball joint under the gear is severely worn. The function of the ball joint: The ball joint, also known as a universal joint, refers to a mechanical structure that uses a spherical connection to transmit power between different axes. The universal joint is a very important component in a car. The combination of the universal joint and the drive shaft is called the universal joint transmission device. In front-engine rear-wheel-drive vehicles, the universal joint transmission device is installed between the transmission output shaft and the drive axle main reducer input shaft; while front-engine front-wheel-drive vehicles omit the drive shaft, and the universal joint is installed between the front axle half-shaft, which is responsible for both driving and steering, and the wheel. Reasons for ball joint wear: Poor working performance of the release fork shaft and too small clutch travel. Severe wear needs to check the corresponding ball joint movement position, no matter what type of ball joint is severely worn.
I've been repairing cars for over 20 years and have encountered many Altima owners complaining about strange noises when braking in D gear. The issue usually lies in the braking system. In D gear, the transmission is still delivering power, and when you brake, the vehicle tends to lurch forward slightly, increasing the friction on the brake pads. If the brake pads are severely worn or have contaminants like small stones or sand, they tend to squeak. Check if the brake discs are uneven or scratched, which is quite common in the rear braking system of the new Altima. Also, inspect whether the brake caliper guide pins lack grease, as insufficient lubrication can intensify component friction. Don't ignore these sounds—get the braking force tested at a dealership early to prevent the problem from worsening and affecting driving safety, which could end up costing you more in the long run.
I also drive the new Teana. When stopping at a red light in D gear and pressing the brake, the car makes a clunking sound a few times, which startled me at first. Later, I had a mechanic check it out, and he said it was caused by uneven friction of the brake pads under the pressure of D gear. In my case, it was because the brake pads were almost worn out, and the problem disappeared after replacing them. If the sound you hear is sharp, it might be due to a warped brake disc or foreign objects; if it's dull, check the brake master cylinder or suspension connections. I always take good care of my car, cleaning the wheel hub area every time after washing to prevent sand and dirt buildup. Although the noise might seem minor, it reminds us of the importance of maintenance. Ignoring it can lead to reduced braking efficiency and increased accident risks—definitely not worth the gamble.
