transmission leaking fluid

I would check the seal where the shift linkage exits the case. Also don't overlook the dipstick "O" ring. If your not sure, blast the bottom of the pan with some brake clean or carb. cleaner and get it as clean as possible and deliberately park the car in a place where you can get under it easily with a light. If it's the dipstick tube "O" ring it's a relatively simple fix. If it's the seal for the shift lever, that's a bit more involved. Check the service manual and see what's involved. The valve body may have to be dropped out. Maybe someone else here could help out with this.