93" yj 350swap and 700r4 trans. I have a loud grind when I first push on the gas but goes away after pushing further in. The. A loud grind again when letting off at the very end. Can't tell if it's coming from the front of the engine or t-case area. Most prevalent when going over 30+mph. Ujoints "seem" good. Also at higher speeds when I put it in neutral (test for grind) it ground the time until putting it back in gear. Can't figure it out, help.