904 Transmission Leak

I would check the pan & pan bolts, especially if it has a sheet metal pan. Mine developed a leak very nearly the same & I had a time trying to find it. I finally took the pan off & it was cracked around two of the bolt holes causing it to leak. I replaced the sheet metal pan with a deep cast aluminum pan & "voila", no more leaks. I've had this same pan on for ten years & have only removed it twice to check adjustments & change the fluid & filter.