im thinking its the caliper, because i have no abs lights and i tryied it on ice (at slow speeds) and i could feel the Abs pulsing but the same wheel locked, but if i just slam on them and i lock up the wheel i know the other isnt locking and im fairly sure the abs is pulsing i just cant feel it or i can barly feel it. are you saying if i feel pulsing its probably the rotor?