I've owned this truck since June and not once has the ABS been activated. Now, after the 33" Revos, it seems like if I brake and hit any sort of bump the ABS will kick in. I've had these tires about a month and the ABS has activated at least half a dozen times since then in the same sort of situation. Not severe braking but braking over rough surfaces. Anyone notice this or is my rig or the driver insane?