What is the sound from the rear wheel when starting the car?

[WestonLynn]

This is the sound from the braking system. Below is relevant information about the braking system: 1. Introduction: The braking system consists of a control system, hydraulic system, and power assist system. 2. Working principle: The principle of the braking system is to generate significant friction, converting the vehicle's kinetic energy into thermal energy. As we all know, energy cannot be created or destroyed, it can only be transformed from one form to another, or transferred from one object to another, with the total amount of energy remaining constant during the process of transformation or transfer. During acceleration, the car converts chemical energy into thermal and kinetic energy, and when braking, the braking system converts the car's kinetic energy into thermal energy, which is then dissipated into the air.

[DelAxel]

I've been repairing cars for many years. A noise from the rear wheels during startup is mostly caused by rusted brake discs sticking, especially after parking overnight or starting after rain when you'll hear friction sounds. It could also be due to loose wheel hub bearings, creating abnormal noises when the wheels rotate while driving. Don't underestimate this issue—it can seriously affect braking performance if left unchecked. I recommend inspecting the brake system and wheel axle areas as soon as possible. Regular car maintenance can prevent rust; just use some brake cleaner. Safety is no small matter—don't delay repairs to save money and end up needing major overhauls. Taking some time to check things is always worthwhile.

[AsherDella]

My SUV often makes a creaking sound from the rear wheels when starting cold. The mechanic said it could be due to stuck brake pads or wheel bearing issues. It's more noticeable in cold weather. A simple method is to lightly press the brakes before moving to identify the source of the sound. If it only happens once, it might be safer, but if the sound persists, you must take it to the shop to check for wheel hub wear. My experience is to park in a dry place to reduce rust and make it a habit to check tire conditions. These small details can make driving more reassuring.

[Blake]

A noise from the rear wheel upon startup might be due to sticky brake pads or an old, loose wheel hub. After driving your car onto a ramp, try pushing the wheel to check for resistance. If it's stuck, replace the parts soon. Don't wait until the noise worsens—it's costly and dangerous. Choosing good tires to minimize slipping saves money and hassle. Safety first—address issues promptly for simple and efficient solutions.