I just replaced the front shocks. New aluminum wheels & Hankook tires. Wheels & tires were balanced. New brake pads. Original hub & rotors. Problem is when I'm traveling over 40 mph and apply the brakes firmly, the left front tire vibrates. I can see the fender vibrate up & down. This isn't a pulsating action like the rotor is warped. It's a vibration. I've never experienced this. I haven't rotated the wheels yet. Anyone experienced something like this? Looking for ideas.