ROGER, sorry buddy as I'm trying to understand your question? ANYONE DONE WHAT TO WHAT? What and where is whatever leaking? As for FAN and driveshaft coming off, what VEHICLES GEARBOX? Need more information.
Could this be for one of your two vehicles? If so which one and what? 2010 Allegro Bus 43 QBP . . . 2016 Lincoln MKX
Thinking of the connection between Transmission and Driveshaft, there should be a peace missing that connects the two together. It looks like a CROSS with even ends. And once in place is filled with impact grease to keep the ends pushed out connecting the transmission and driveshaft. As when this happens on the roadway that part is found laying on the roadway about 200-yards behind the vehicle. Try and recall when this happened and walk back looking for the CROSS as it's about 4" inch CROSS CENTER. Good Luck. If I understand you correctly?
