[tkswan]

Im pretty certian its the ABS system. it happens only when you apply the brake pedal so im sure its the ABS. besides, I have felt what the ABS feels like before on this car. The pulsation is definately in the brake pedal.

The front wheels aren't turned to the left stop. I try to avoid doing that to the front end so the ps pump shouldnt be under any stress should it? If you think its possibly the pump, shouldn't I feel it more evenly in the front end. I did some tests during lunch -- drove around in a left circle in a parking lot. ...looking like a fool. When I [gently] apply the brake pedal the ABS starts ABSing. Its all happening at the front right wheel when the steering is turned all the way to the left.

Is the tone ring another term for the speed sensor?