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The Terminator
Suspension Modifications
Front brakes shake at times when stopping
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<blockquote data-quote="jm@ReischePerf" data-source="post: 6107296" data-attributes="member: 48129"><p>Ok well instead of a warped rotor they're calling it disc thickness variation (DTV) out of tolerance. I think this is a bit of semantics. The article goes on to say that excessive runout (total runout after installation), and other factors, leads to excessive DTV, which can then lead to pulsation. I think the moral of the story is that the rotor is the effect not the cause. I never have argued against this point. Possible causation factors:</p><p></p><p>1. Unclean rotor/hub mating surface</p><p>2. Rotors improperly machined (Shelbyguy - I noticed that occasionally the rotor was improperly positioned and after some adjustment had less runout, but to assume this is the sole reason for excessive runout/DTV in every rotor is highly improbable)</p><p>3. Caliper issues: not sliding properly, or piston not retracting properly. This is where I feel the problem usually lies.</p><p>4. Bad bearings: Ok I can see where this could lead to DTV also.</p></blockquote><p></p>
[QUOTE="jm@ReischePerf, post: 6107296, member: 48129"] Ok well instead of a warped rotor they're calling it disc thickness variation (DTV) out of tolerance. I think this is a bit of semantics. The article goes on to say that excessive runout (total runout after installation), and other factors, leads to excessive DTV, which can then lead to pulsation. I think the moral of the story is that the rotor is the effect not the cause. I never have argued against this point. Possible causation factors: 1. Unclean rotor/hub mating surface 2. Rotors improperly machined (Shelbyguy - I noticed that occasionally the rotor was improperly positioned and after some adjustment had less runout, but to assume this is the sole reason for excessive runout/DTV in every rotor is highly improbable) 3. Caliper issues: not sliding properly, or piston not retracting properly. This is where I feel the problem usually lies. 4. Bad bearings: Ok I can see where this could lead to DTV also. [/QUOTE]
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Front brakes shake at times when stopping
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