What would cause my car to sometimes pull strong to the right when braking at slow speeds? It doesn't appear to be an alignment problem since it only happens during braking...and even then, not always. If I slow down and let my hands off the steering wheel and gradually depress on the brakes, I can see it pulling the steering wheel (and car) to the right. Are these problems with the rotors? Someone suggested could be bad ball joints? This is a 1997 E320 with 79K miles. Thanks.