My Parents Refuse to Speak to me, Why?

well your parents did not want you to even drive and i dont see why you have to guilt your grandma into letting you drive. so the answer is simple, u pretty much should not have even taken the car against your fathers wishes. i dont blame him for not speaking to u. how would u feel if u had a kid that killed your mom? would u wanna go up to him and hug him and take him to dinner? no? then this is your own problem. go talk to your father and see how much of your relationship u cant put back together with him before its too late.