Well my rotors had lines on them bc of the cheap fake branded parts so thats on me so i felt pulse and vib from pedal and once i got them shaved the vib from pedal and when braking went away but i still had the vib around 70-80 and i the drive shaft is what you mean i think. Well i have been paying good attention and i can add that when turning left at speed like a long left or a long right i can hear oscillating sound that sounds like a bad bearing on the wheels since once you go straight and less pressure on left or right the sound softens.