found this out when my transmission jack bleed down overnight which lowered the rear end of my transmission and allowed the fresh Redline fluid to flood my garage floor. This last time I removed the transmission I didn't take a chance and just stuck the drive shaft back into the transmission and put both to the side until I was ready for installation. This saved my time and money trying to locate a plug as well as saved me from purchasing another 3 liters of Redline. I am sure the more experienced guys will have good information/recommendation for a plug. Good luck