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The pistons are not the problem. The problem addressed by the TSB relates the the torque member (frame) within which the pads ride. These were binding causing the pads to rest against the face of the rotor causing excessive heat leading to the warped rotor. The TSB originally covered the turning of the rotors replacement of pads and the application of a specific grease to the ways or pins in the stiffiner. The modified TSB "A", amended the original adding a new torque member, Pins (bolts) and seals (boots). Had this TSB done at 6400 now at 10000 and the warp/shudder has not returned. Good luck.
,Les
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Boone-Titan
Radiant Silver LE, CC, 4WD, Big Tow,
DVD, Side Air Bags, LowProTruxedo,
Bed Extender, Vent Shades, Lund Bug Shield,
Bed Tube Rails, Street Scene Grills, KC Slimlites,
Auto Tailgate Lock, Aux Back Up Lights
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