Hi guys, today I have a problem with my X on freeway. Normally I drive from home to work everyday locally with speed <50 mph. When I went on freeway today, my X start making "errrrrrrrr..." noise very noticeable from under the hood. The noise only seems to start when my speed is over 60 mph. Wierd thing is when I accelerated there was no noise at all, but when I release the gas pedal the noise appeared. I checked under the hood for anything that seems to be loosen but no luck at all.

So what do you think what happen to my X? Engine problem or tranny problem?

I think i better call my dealer for an appointment soon.