I just finished swapping the ****** out and will test drive it tomorrow once Amazon delivers the ATF. Imo kniwcit was something with the torque converter because mine started the sound only when in 4wd. then I flushed the ****** and put some shudder fix in and it stopped altogether for a week. then slowly came back. Now it has started doing it in 2wd. I was explained that the reason it does it more often in 4wd is because their is more strain on the torque converter when going in 4WD.