Posts Tagged: Disc thickness variation
Brake Rotor Warp Myth: What Causes Brake Pedal Pulsation
Brake Rotor Warp Is a Myth: What Really Causes Brake Pedal Pulsation and Brake Judder Quick Summary Most drivers — and even many technicians — still believe that brake rotor warp is what causes brake pedal pulsation and brake judder. After decades of brake work and advanced diagnostics, I can tell you that’s usually wrong. In almost every street vehicle I’ve diagnosed, the real problem wasn’t a physically warped rotor at all. The real culprit was disc thickness variation (DTV) caused by rotor lateral runout, uneven pad deposits, improper lug … Read More
Disc thickness variation and the myth of warped rotors
Understanding disc thickness variation and why it’s confused with rotor warp Disc thickness variation (DTV) is a brake rotor condition where opposite faces of the brake rotor accumulate an extra thickness of brake friction material or thinness due to uneven wear. When a brake rotor develops DTV it causes brake pedal pulsation during braking. Most people refer to this as rotor warp. But rotors don’t warp. In fact, the braking system on stock cars and trucks can’t possibly generate enough heat to warp a brake rotor. Don’t believe me? See … Read More