I have a 2007 F250 diesel that makes a huming noise when I accelerate it started doing it when it would get warm but know seems to be doing it more, it also seems to loose power when I go to passing someone as it makes the huming noise. I really would like to know what it could be..

I have a 2007 F250 diesel that makes a huming noise when i accelerate it started doing it when it would get warm but know seems to be doing it more, it also seems to loose power when i go to passing someone as it makes the huming noise. I really would like to know what it could be..

This question belongs in automotive not management