727 leak @ tailshaft when on jack stands?

simple seal issue was the obvious guess here too. '408' is right on about the slipyoke. easier to check it with air compressor though. and the last one about the tailshaft bushing...my old valiant had the driveline get hit hard and made it out of round. it tore up that bushing in the trans terribly. it leaked, i replace the rear seal, it leaked in a couple days. that bushing has thin sharp metal and turned out the pieces of the wasted bushing were eating the new seal.