Contour Enthusiasts Group Archives Forums Modifications Brakes ABS operating before wheel lock???

Just wondering if it's normal to feel the ABS pump operating during hard braking. I can feel the brake pedal pulsating well before wheel lock-up. Seems to more of an annoyance than anything but if it's not normal I'd like to get it fixed. Maybe it's just a certain rate of wheel deceleration that is causing it...any ideas???