I finally located the true source of my transmission leak. It is the Accumulator cover that is leaking. I would like any advice on how to go about fixing it...can I do it myself or is it something that a transmission shop needs to do? How hard is it to get the cover back on without specialized tools? By the way, I found this great website that has all the transmission parts laid out in a schematic with hyperlinked part numbers... https://www.wittrans.com/Schematic.aspx?Transmission=250/250C/350/350C They have the accumulator cover and seal and just about everything else you could want...even a pan with a drain.