I need help bad. I replaced on the drivers side the wheel bearing and tie rod all motor mounts were changed to poly in the last month. The car still vibrates under acceleration only at 50+ mph. When not under throttle it is completely smooth. Under throttle it shakes pretty bad. I think it is a different problem but if I go around a corner and give it a little gas I can hear a loud rattling in the rear of the car. Please help me figure what is causing this. I am sick of replacing parts that don't need to be fixed.