I was driving my el camino on the highway yesterday and i has having some problems. First of all the car would vibrate at around 60-70 mph. I checked the tires and the air in the air shocks and all is okay. Also i checked the anti sway bar links and they were fine. Also when i brake the car steers very wierd wanting to dive to one way or the other. What is going on! I can't figure out where the vibration is comming from.