I found out the resonnating noise I am hearing while driving on the highway or when accelerating is not from the transmission but from the AC system. The resonnating noise is starts when the compressor starts and stops when the compressor stops and occurs only during acceleration and when driving at highway speeds. There is no resonating noise when the AC is on while driving in the city (below 45 MPH) or when idling. The AC works great, the compressor runs quite, and the temp is super cold. If the noise starts I can shut off the AC and the noise will stop.

The noise sounds like old electric window air conditioner or a loose piece of metal vibrating and eminates on the drivers side in the lower left hand corner.

Is there a AC relay that would vibrate if loose? I can not go on a long distance trip with this constant droning on and off and I do not want to have to sweat on the leather seats to not have to hear the noise.

Any help would be appreciated