Why would a car experience rapid vibration with a very loud low-frequency rumbling sound--softly at mid speeds and violently at high speeds when going straight or left but not when going right?

Answer 1

Although this is a general question, I'll help clarify the specific situation that caused me to ask: I have a 2000 Maxima that rumbles violently at highway speeds, but less so--if at all--when steering to the right. There is an audible rumbling sound that is very loud and low frequency, much like tires on gravel or rough asphault. The effect is abscent below 30, noticable at 50, and violent at 70. i had that problem with my civic it was the wheel barring