How Often Should Brake Fluid and Transmission Fluid Be Replaced?
2 Answers
Brake fluid and transmission fluid should be replaced every two years. Below are the relevant introductions: The function of automotive brake fluid: Brake fluid, also known as hydraulic brake fluid, is a functional liquid in a vehicle's braking system that transmits pressure to enable the braking action on the wheels. Its main roles include energy transmission, heat dissipation, anti-corrosion and anti-rust, as well as lubrication. The function of automotive transmission fluid: Automotive transmission fluid is an oil product that keeps the gear system clean and plays a role in lubrication to extend the lifespan of the transmission device. It provides effective lubrication even at low temperatures and reduces fluid loss under harsh operating conditions. Depending on the structure of the transmission, transmission fluid is further categorized into automatic transmission fluid and manual transmission fluid.
As an experienced driver who often tinkers with cars, I believe the replacement frequency of brake fluid and transmission fluid should never be neglected. Brake fluid should typically be changed every two years because it easily absorbs moisture from the air. Over time, excessive moisture lowers its boiling point, making the brake pedal feel spongy during braking, which is very dangerous. As for transmission fluid, automatic transmission cars should have it replaced every 40,000 to 60,000 kilometers for optimal safety, while manual transmission cars can last up to around 80,000 kilometers. Never skimp on these small expenses—I’ve personally seen a friend’s brake master cylinder corrode and fail due to neglected fluid changes, costing thousands in repairs. Regular maintenance is crucial, and I make it a habit to check the fluid condition every six months. Darkening or unusual odors are clear warning signs. The vehicle manual is the bible—always refer to your specific model’s guidelines for accurate advice.
