2016 freightliner dpf box making weird noise?

Hello we have a 2016 freightliner with a dd13 and the dpf box under load makes a very weird loud noise. It did this a month ago and we took out the dpf filters and cleaned them. The noise went away for a couple weeks and know came back. It only does it under load and when it does this it feels like engine loses a little bit of power. Any ideas?

 

no exhaust leak, we checked everything like crazy because one time the truck shut off when it was going uphill and it was making the noise really loud. After that we were inspecting for leaks because there is a code for intake manifold pressure low so we thought we had a intake leak but couldnt find anything even with smoke