OK, 1864 could be leaking from the cork gasket between the pump and the transmission. It could be leaking from the 2 relief valves on the pump. It could be the rear cover and it could be the bolts that go through the frame and axle tubes, yes they go all the way through into the case. Plan on removing the fender pan and gas tank and giving it a good cleaning. They can also leak from the axle seals but then you would see oil dripping from the back side of the disk brakes. Reality is you have a 20+ year old tractor and all of this stuff is due about this time, ask me how I know. You probably wont need to get this involved but take a look at this thread.
http://www.onlycubcadets.net/forum/s...ad.php?t=21261