I have a 98 Dodge Avenger. Had new rotors put on front and rear. Also new rear brakes, front were good. The other day i had the front tires balanced, steering whell shook when reaching 60mph. This should have been done when rotors were put on, lesson learned about mechanics. My question is why now after repairs done is car shaking when stepping on brakes.? Do i now need a rear wheel balancing or do i need all four alignment and what is the difference? Someone Please help! I'm learning!