Tranny fluid leak

[Ken92SVX]

I have a 92 SVX that has 154,000 mile on it and have had it about 1 and a half months. It has a tranny leak that I have not been able to locate. It is not from the pan as I have changed the fluid and replaced the pan gasket. It appears to be coming from, aft of the pan, higher up on the aft part of the tranny before it meets the drive shaft. Is this a common problem? Does anyone know where it might be from? The vehicle seems to shift fine, and does not seemed to be delayed in shifting from park to drive or from park to reverse; it shifts in about 1/2 to 1 second.