Why Does an Automatic Transmission Car's Brake Make Abnormal Noises?

[VeraFitz]

Automatic transmission brake abnormal noises can be caused by: 1. Rust on the brake disc or brake pads; 2. New brake pads; 3. Excessive wear of the brake disc and brake pads; 4. Incorrect installation or mismatched model of brake pads; 5. Use of low-quality or overly hard brake pads; 6. Abnormal brake caliper or lack of brake fluid; 7. Presence of foreign objects between the brake drum or disc and the shoe. The function of the brake is to reduce speed or bring the vehicle to a stop. Its working principle involves converting the kinetic energy of the moving vehicle into heat energy through friction between the brake pads and the brake drum, as well as between the tires and the ground, thereby slowing down or stopping the car.

[OJudah]

I've been driving for over a decade and have quite some experience with brake noises. When an automatic transmission car squeaks during braking, the most common cause is brake pads worn too thin – they'll start making noise as a reminder when they reach a certain thinness. Another possibility is small stones getting stuck between the brake disc gaps, producing clicking sounds when braking. My car had this issue recently – it made grinding noises during gentle braking, and upon inspection, we found slight warping of the brake disc. It could also be due to improperly secured brake calipers or insufficient lubrication causing abnormal friction. These issues aren't just annoying; they can affect braking distance and pose safety risks. I recommend checking your brake pad thickness immediately when you notice any noise – you can measure the remaining thickness with your finger, or take it to a reliable repair shop right away. During regular maintenance every six months, have technicians thoroughly inspect the entire brake system, including brake fluid replacement. Prevention is better than cure – it helps avoid major problems that could compromise driving safety.

[StAnna]

As a car enthusiast, I must remind you not to underestimate the issue of abnormal brake noises in automatic transmission vehicles. The type of sound is crucial: if it's a squeaking noise, it usually indicates the brake pads are severely worn and nearing replacement; a grinding sound might suggest cracked or warped brake rotors; while a clicking noise often means foreign objects like small stones are lodged in the system. Ignoring these sounds can worsen rotor damage, reduce braking efficiency, and in extreme cases, lead to failure to stop and rear-end collisions. I've personally experienced similar situations and learned to replace worn components proactively. Additionally, insufficient hydraulic pressure in the braking system or faulty ABS sensors can also cause abnormal noises, particularly noticeable during low-speed jerking in automatic cars. I recommend identifying the noise source promptly, visiting a professional shop for diagnostic tool testing, and avoiding driving with unresolved issues. Develop a habit of regular maintenance, ensuring brake inspections during every service to guarantee driving safety.

[LiamFitz]

Don't ignore noises from automatic transmission brakes. Common causes include squeaking from excessively worn brake pads, clicking from foreign objects like sand stuck on brake discs, friction noise from loose or unlubricated brake calipers, and potential wheel hub bearing wear. When I handle it myself, I first perform simple checks: listen for the noise location and repeatedly brake to observe the pattern of abnormal sounds. If you're a novice, don't attempt disassembly yourself—seek repair promptly. Prolonged noise can worsen brake component damage and even compromise safety. Remember, regular maintenance checks can prevent most issues.

[Cruz]

I've encountered brake noise issues several times and summarized some diagnostic points. First, check the brake pad thickness after parking – replace if thinner than 3mm. Second, inspect the brake disc surface for scratches, unevenness, or embedded stones. Third, test the brakes to see if the noise occurs during startup or while driving. For automatic transmission vehicles, also note that noise when parked might relate to the P-lock mechanism. Personal experience: Minor issues like debris removal can help, but severe cases require part replacement. Don't skimp on repair costs – prolonged braking distance could cause accidents. It's best to inspect the brake system quarterly, maintaining cleanliness and lubrication for prevention.