You will need to narrow down your leak. Are you SURE it is comming from the rear? Sometimes you can have a leak in the front and it blows down to the rear. (don't ask)
As far a rear oil leak, check for;
Rope seal, pan seal, intake 2 block seal, Oil return tube.
If after that it still leaks and you are convinced it is from the rear, than it is time to look at the cam and oil gallery plugs.
As far as the transmission leak goes, look for; Speedo cable, Converter seal, transmission pan seal, filler tube, TV cable, oil cooler lines, vent tube, drive shaft seal.
(Sad to know I can do this on top of my head)