Ive got this e350 7.3 idi with an E40d transmission. I cant figure out if the sound is related to the torque converter or a gear is cooked inside. My best hope is that it is engine related and maybe out of fuel. The sound is twice as loud as the normal engine does. At first I thought it was the exhaust valve going out because it does chuff out the exhaust once in a while. For about 10 miles sweating bullets driving it home, it got slightly louder and louder. I dont think it is the engine. RPM on reverse and drive are the same but they produce different sounds. Was wondering how I can confirm it's the torque converter so I can order a new one while I take out the trans. The video doesnt sound the same as in real life. Reverse is significanly queter than drive. reverse sounds like asmr to my ear and drive sounds like death metal.