Your brake system is far more than pads, rotors, and calipers. Today we're continuing our look at the hydraulic side of the braking system, focusing on the pressure differential valve and the critical job it performs when you put your foot on the brake pedal.

We're talking about how hydraulic pressure is distributed through the system, why the rear brakes need to begin doing their job as the vehicle's weight transfers forward, and what can happen when that system doesn't operate properly.

And we're also talking about something the "maintenance - free" crowd doesn't always want to discuss: brake fluid doesn't last forever.

Brake fluid is hygroscopic, meaning it absorbs moisture. Years of heating and cooling can contaminate the fluid and contribute to corrosion and problems throughout the hydrauli ...