The prime mechanism in your Pontiac that provides you that dependable and highly efficient braking action is its braking system. This is what makes your vehicle stop or slow down so that you can navigate the road safely and accurately. Its efficiency greatly influences your handling and control, as well as your ride quality. With the proper operations of your braking system, accidents and any untoward incidents on the road is reduced. The basic braking system is composed of the disc brakes that are employed in the front wheels and the drum brakes that are used on the rear wheels which are connected thru a series of tubes and hoses that primarily link the brake to each wheel and to the master cylinder. In a drum brake system, applying force to the brake pedal will send the hydraulic fluid to the Pontiac wheel cylinder which will then force the brake shoes out so that the friction linings will make a positive contact into the drum. This in turn causes the wheels to stop or slow down. The Pontiac wheel cylinder is equipped with movable pistons which are mounted one at each side. Each of these pistons is geared with a rubber seal with a shaft that attaches the piston to the brake shoes. The wheel cylinder is usually composed of cylindrical casting, pistons, and rubber boots that prevent the accumulation of contaminants, rubber cups or seals, and an internal compression spring. This type of cylinder employs a push rod that extends from the outer side of each piston through the rubber boot, where they stay against the brake shoes. Return springs are used to draw back the pistons away from the drum if the pressure is released. If you are having a hard time choosing for the best site where you can acquire original quality Pontiac wheel cylinder, you can absolutely get it from us. Our online auto parts catalog carries its huge array that will surely fit on most Pontiac models.