Technical Bulletins

Raybestos offers technical bulletins that cover various brake conditions that are known to occur in vehicles. These bulletins can help you troubleshoot a problem when a vehicle is in your shop and help you find a solution.

In each technical bulletin, you will find the following information:

  • Subject line
  • Vehicle(s) Involved
  • Condition
  • Repair Procedure

Search Technical Bulletins

Brake Pad Burnishing

 Brake Pad Burnishing on Severe Duty Applications

ABS Equipped Vehicles / On car Lathe

How to use an on-car lathe with ABS-equipped vehicles. 

ABS light on or false ABS activation after wheel bearing hub replacement

What to do when the ABS light is on or there is a false ABS activation after a wheel bearing hub replacement.

Brake Bleeding

A discussion about brake bleeding.

Brake Bleeding Methods

A discussion about the three most common methods used to bleed brakes. 

Brake Fluid Integrity

A disussion about how brake fluid can cause corrosion in your hydraulic system over time. 

Brake Lathe Maintenance Tips

Tips on brake lathe maintenance. 

Brake Lubricant, what to use and where

A discussion about brake lubricant, including what to use and where to use it. 

Brake Noise, Vibration and Harshness

A discussion about brake noise, vibration and harshness

Brake Noise, Vibration, and Harshness

A discussion about brake noise caused by rotor composition. 

Brake Pad puck (lining) Shearing

A discussion about the causes of brake pad puck (lining) shearing. 

Brake Pedal Pulsation 2-4,000 miles after brake service

A discussion about the cause of brake pedal pulsation 2-4,000 miles after brake service.

Brake Pulsation

A discussion about the cause of pedal pulsation. 

Brake Pulsation front or rear?

How to determine if brake pulsation is coming from the front or rear in vehicles with four-wheel disc brakes. 

Brake Service Lubrication Disc & Drum Applications

A discussion about lubrication and where to locate lubrication points.

Brake hose restriction

How to identify brake hose restriction. 

Braking Principles

A discussion about the basic principles of braking. 

Calibration of Bench-Type Lathes

How to calibrate a bench-type brake lathe. 

Caliper Service

A discussion about the features and benefits of rebuilt calipers. 

Ceramic Brake Pads

A discussion about ceramic brake pads. 

Checking Rotor Runout Correctly

How to properly check rotor runout. 

Cleaning Rotors

How to properly clean a new or machined rotor before installation. 

Comparing Different Types of Brake Fluid

A discussion about the different types of brake fluid and their distinguishing characteristics. 

Digital Volt OHM Meters

A discussion about digital volt-ohm meters (DVOM) and its importance in diagnosing electrical and electronic problems.

Disc brake squeal after brake reline

How to diagnose the problem of disc brake squeal after brake reline. 

Dragging brakes on lifted trucks

How to fix brake drag on lifted trucks. 

Easy Rear Drum Brake Service

A quick tip that makes service to rear drum brakes easier.

Electrical Circuit Repairs

A discussion about electrical circuit repairs.

Electrical Circuit Repairs and Replacing Components

How to repair or attach a wire to a circuit. 

Friction technology

A discussion about the development, refinement and implementation of Raybestos friction technology. 

Hard braking when cold, lack of power assist

How to fix hard braking/lack of power assist in cold weather. 

High Performance/Fleet duty Rotors

How to resurface high performance/fleet duty rotors.

Hybrid Vehicle Safety Precautions

A discussion about the safety precautions you need to take before servicing a hybrid vehicle.

Importance of On-Vehicle Brake Lathe Use

A discussion about the importance of on-vehicle brake lathe use. 

Infrared Thermometer used to evaluate brake system efficiency

A discussion about infrared thermometers and how they are used to evaluate brake system efficiency.

Inspecting Brake Fluid

A discussion about inspecting your brake fluid, testing your brake fluid for moisture content and diagnosing the cause of low fluid levels. 

Intermittent Brake Pull

How to diagnose and correct the cause of brake pull.

Low brake pedal isolation procedure

How to perform an isolation test when you have a low brake pedal.

Low-Sinking or Spongy Brake Pedal

How to fix a low-sinking or spongy brake pedal. 

Low/Spongy Brake Pedal Causes

How to diagnose the cause of a low/spongy brake pedal with an isolation test. 

Lubricating Brake Components

A discussion about brake lubricants.

Manual Transmission Clutch Replacement Concerns

A discussion on the concerns surrounding manual transmission clutch replacement.

Master Cylinder Fluid Levels

A discussion about what to do if the brake fluid levels in your master cylinder reservoir are too high or too low. 

Master cylinder bench bleeding

How to bench bleed a step bore master cylinder. 

Minimizing Brake Dust on wheels

How to minimize brake dust on wheels. 

Misleading ABS Codes from Improper Voltage

How improper voltage can lead to misleading ABS codes.

Noise / Brake pull / Pulsation complaints could be related to bearing failure:

How noise, brake pull and/or pulsation could be caused by bearing failure and how to identify it.

Non-Ferris Ceramic Brake Pads Originally Equipped or Back

A discussion about non-ferris ceramic brake pads.

On-The-Car Brake Lathe

A discussion about on-the-car brake lathes.

Oscilloscope as a diagnostic tool

A discussion about using oscilloscopes as a diagnostic tool for malfunctioning ABS systems. 

Passive and Active wheel speed sensors

A discussion about passive and active wheel speed sensors.

Pedal pulsation after brake service

How to fix lateral runout causing pedal pulsation one to 12 thousand miles after a brake service. 

Pressure Bleeders

How to purge air and contaminates from a hydraulic system with a pressure bleeder.

Problems Cause by Corrosion on Calipers

A discussion about how corrosion on your calipers can cause problems with your brake system. 

Problems Caused by Corrosion on Rotors

A discussion about how corrosion on your rotors can cause problems with your brake system. 

Proper Use of Brake Pad lubricants

How to properly use brake lubricants.

Quick check for rear brake shoe contact area

How to do a quick check for rear brake shoe contact area.

RWAL/RABS Valves Restricting Fluid Flow To The Rear Brakes

How to diagnose if the RWAL/RABS valves are restricting fluid flow on Kelsey Hayes rear wheel ABS systems.

Resurfacing Drilled and Slotted Performance Rotors

How to resurface drilled and slotted performance rotors. 

Rotor Lateral Runout Specifications

How to check the lateral runout on a rotor. 

Rotor looks to have “hot spots” on surface

A discussion about “hot spots” on a rotor's surface. 

Rotors and pads determine Brake Operating Temperature

How to maintain a safe brake temperature.

Safety issues using lightweight rotors

A discussion about the safety issues of using lightweight rotors. 

Sanding Drums and Rotors

A discussion on why sanding drums and rotors is NOT recommended. 

Slow speed ABS false modulation

How to resolve slow-speed ABS false modulation.

Slow speed ABS false modulation

How to fix slow speed ABS false modulation on SUVs and Light and Medium Duty Trucks. This is a revision of bulletin 02-02.

Source voltage

How to see if low source voltage is causing your ABS system to malfunction. 

Testing Magneto Resistive Wheel Speed sensor

How to troubleshoot the magneto resistive wheel speed sensor.

Torque limiting sockets (torque stick)

A discussion about torque limiting sockets (torque sticks).

Variable reluctance Wheel Speed Sensors

A discussion about variable reluctance wheel speed sensors. 

Voltage Drop Tests

A discussion about voltage drop tests.

Wheel Speed Sensor Testing

Test procedures for wheel speed sensor testing.