Hello. My Altima has about 85000 miles on it and it makes a loud noise in the rear of the car when I hit 40 mph. Then it goes away (or gets lower) at 45, then back loud at 60, then lower, then away at like 80. Had it checked for the transmission becuase I orginally thought it was associated with shifting.
Had new breaks put in today and had tires rotated. The noise is still there, though not quite as loud.