[jamey666]

I have seen some transmissions make some funky noises when they are on their way out. If it goes away when you let off the gas, it is very possible. Generally, the axle seals will start puking trans fluid shortly before or after the bearings go. I havent seen it quite as loud as what you are describing though...i hope thats not it!! also check all of your exhaust heat shields, they can be pretty loud and annoying also, and much more common...hope this helped, thats the best i can do with the info ive got!!