My Cruiser's taking a leak

Sounds like the rear output seal on your transfer case fairly cheap to replace. on the early models the brake drum can put extra weight on the seal area of the output yoke and grove it so you may also need to repair or replace the yoke.
cheers L&N

find the transfer case breather. sometimes they just need a twiddle with your fingers to release the preessure if they are a bit blocked ( it right on top ) - turn it back an forth

There is an oil seal on the rear of the t/case. It should be a silicone type not ordinary rubber as the brake generates some heat. Mine leaked and the sealing surface of the drum had worn so I fitted a speedy sleeve onto the seal area of the drum brake. To replace - drain t/case, drop rear shaft - un-stake big nut and undo - remove drum - remove backing plate - lever out the seal and replace.
Also if you don't already know about the cross-feeding of oil between the gearbox and t/case here is another handy hint. These old cruisers have a seal between the t/case and gearbox which fails. When that happens the oil will 'pump' forwards from the t/case into the gearbox. A quick fix is to get a hose company such as Pirtek to make up a hose that screws into g/box filler plug and t/case filler plug. That way when the g/box over fills it simply drains back into t/case. Mine worked that way for years.
Mike.