Air in the brake system can make your brake pedal feel spongy and vague. You should flush the fluid every two or three years, ...

Use brake fluid test strips or a pen tester to measure brake fluid quality, condition and color. Old or contaminated brake ...

It's a good idea to flush the old brake fluid whenever the car requires brake servicing. Inspecting the condition of the brake fluid at every oil change is also good practice. If the brake fluid ...

If you are switching from DOT3 to DOT4, it is advisable to completely flush the old brake fluid from the system using a professional brake fluid bleeding tool.

Brake fluid is hygroscopic ... This leaves three to six quarts of old ATF in the transmission. Or you can have your repair shop flush and refill the transmission with all new fluid.