I just bought a new car... Whenever I try to brake, the car jerks as if the ABS is coming on, but the ABS light doesn't come on. Has anyone heard of this problem before? or does anyone have a solution to this? any ideas would be appreciated... thanks 
The jerking happens everytime I brake hard... if I brake slowly, it wont come on, but if i brake hard, then the car will start to jerk

The jerking happens everytime I brake hard... if I brake slowly, it wont come on, but if i brake hard, then the car will start to jerk