Ok so when I it 65 + my rear left suspension(i think) makes a loud noise like a machine gun till I slow down..it also happens over rough roads. Ive read things about knucke bushings and all that but Im not sure if thats what mine is since it is doing it at high speeds also. My car is lowered 2.0 on goldline springs and different struts, so what could it be besides the struts?