Swepco won't stop leaks but it will help improve the shifting.
The reason I asked about where it leaks from is that some leaks are repairable with the trans in the car.
On the bottom there is a plate with 4 bolts that tends to leak. A paper gasket is all that is needed here.
Also, the shift rod seal is known to leak and that is accessible from the rear access panel. It isn't an easy job but doable with patience.
I didn't mean to sidetrack you from your project.