A&B Transmission and Automotive Service

Automotive Brake Repair and Brake Service in San Bernardino, CA

What Brakes Do

Properly working brakes slow down and stop your car or truck.

How Brakes Work

There are basically two types of brakes: Disc Brakes and Drum Brakes. Both types of brakes use pressure and friction to create rolling resistance for your vehicle’s wheels. This friction, in turn, causes your vehicle to slow down and eventually come to a stop.

Disc brakes have a caliper mechanism that presses brake pads tightly against a brake disc, thereby creating the friction that causes the wheel to slow down and eventually stop. Each wheel on your car will typically have a disc brake with a caliper and brake pads.

Drum brakes are composed of a circular drum, and brake shoes are pressed outward and against the inside of the drum mechanism. The brake shoes press tightly to the spinning drum, thereby causing friction that slows down and stops your vehicle. For cars with drum brakes, each wheel will have a single drum and usually two sets of brake shoes that press against the inside of the drum mechanism. 

Some cars or trucks may have both disc brakes and drum brakes; although most modern vehicles now have only disc brakes.

Brake Service and Brake Repair

Understanding how either disc brakes or drum brakes work, you can understand that it takes a tremendous amount of pressure to create the friction required to stop a car or truck. This pressure causes discs, drums, pads, and shoes to wear out over time. An enormous amount of heat can be generated when a car is breaking. This heat causes brake pads and brake shoes to wear out. The friction also causes brake drums and discs to wear out, warp, and have other problems.

Proper brake service involves at least routinely inspecting brake pads, brake discs, brake shoes, and brake drums for wear and damage. Brake shoes and brake pads should be replaced before they wear out completely.

Brake service also includes inspecting the disc brakes for warping and proper thickness. If a brake rotor (disc) becomes to thin or is warped, then the car may not brake properly.

Standard brake service and brake inspection usually includes the removal of all wheels, inspection of all hydraulic fluids, inspection of drums and/or discs, and inspection of brake shoes or brake pads.

Brake repair usually includes the replacement of brake pads and/or shoes; machining/resurfacing of brake discs, or replacement of brake discs. Old brake fluid may also be replaced with new brake fluid and brake lines and related components inspected and replaced as may be necessary or recommended by the brake repair technician.

How to Know It's Time to Repair or Service Your Brakes

You know it’s time to service your breaks when any of the following happen:

  1. It’s been a long time since you last had your brakes professionally inspected
  2. A warning light comes on in your dash indicating a problem with your brakes
  3. When you break you hear squeaking or grinding noises 
  4. Your brakes just don’t work as well as they used to

A & B Transmission
& Automotive Service

(909) 885-0675
Monday - Friday
7am - 4pm
261 E. 5th Street
San Bernardino, CA 92410
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