I'm not familiar with that situation, are you sure it is from the transmission. Are you sure it's not a slightly low fluid situation causing it to suck air and make those noises. I'd think it would have to be a pump issue if it is in the transmission.
+1 on checking for low fluid. Mine made a weird grinding type noise and I saw that I was leaking some fluid at the radiator. Replaced the radiator and checked the fluid for color issues and then filled her up to the right level and it was gone.