What Causes the Squeaking Sound When Shaking the Car Body with the Handbrake On?
2 Answers
Due to the high frequency of brake usage, related components are constantly in a state of consumption and wear, with the speed of consumption and degree of wear closely related to the driver's habits. Sometimes, abnormal noises may occur when using the handbrake. Below is relevant information about the brakes: Causes of abnormal noise: Issues with the brake shoes of the rear drum brakes; Gaps at the handbrake cable fixing points causing friction; The material of the brake shoes, with added metal components that are too hard; Poor assembly of the handbrake shoes and related accessories; Possible abnormal noise when the ratchet is not properly engaged and operated again; Caused by the handbrake return mechanism getting stuck; The elasticity of the handbrake cable has deteriorated. Summary: The sounds from the brake system can be divided into two situations: one is caused by the handbrake return mechanism getting stuck, and the other is due to uneven friction surfaces between the brake shoes and the disc. The latter usually can only be addressed by grinding the brake shoes.
I'm a car DIY enthusiast and often deal with these issues myself. When you hear a squeaking sound after pulling the handbrake and shaking the car body, it's usually caused by rust or wear on the handbrake pads creating friction noise. I've encountered this myself while working on cars, especially after parking in humid conditions where the brake drum tends to rust, causing noise when the pads rub against the drum while shaking the car. Loose suspension components like springs or bushings can also cause similar sounds, particularly noticeable on uneven roads. I recommend first spraying some brake cleaner on the brake area to remove dust or debris for a quick fix. If the noise persists, check the suspension connections for any damage. Long-term neglect can increase brake wear and shorten component lifespan. Regular maintenance, such as checking the brake system every six months, can prevent this—safety first. If all else fails, take it to a professional shop.