Sounds like a metal shredding machine when i accelerate. Sound comes from transmission area. Does not sound when in idle. Automatic tranny shifts fine. I thought it was the t-case and had it rebuilt along with the driveshaft. Didnt fix it. Its super loud and hard to diagnose since it doesnt do it in idle. All oils and fluids have been replaced. Trans fluid had small amount of metal flakes but nothing too significant. Cant figure it out and it drives me insane! Anyone have this problem before or know anything about it?