Originally Posted by DavidPhillips
I am guessing you changed the exhaust and air intake system.
These changes make the truck louder. The noise may have already been there but now it just radiates into the cab more because the engine is quieter with the stock parts.
I noticed it with my dpf delete pipe on and noticed it was worse when I was pulling a heavy trailer. This is my 4th powerstroke and have never heard this, guess I will take it to my wonderfull dealership and let them walk around it and scrathc their heads.