So my jeep has been making a funny noise right under where the skid plate protects the transfer case. See attached video for more explanation. I just had a new clutch put in but it was doing this before hand. If I turn the ac on the sound gets worse, but when its off it only does it when the throttle is pushed and the rpms hit around 1100. https://flic.kr/p/ojQSTx

 

Check every inch of your exhaust. Very possible something came loose or it is contacting something. I've bent my skid into my exhaust and it sounds horrible when I would accelerate.

 

Check all the spot welds on your heat shield. Two were broken on mine, welded them up and no more noise.