I have a '76 Fj40 stock motor and drivetrain, it is stored in my garage. Occasionally there is a pool of oil underneath where the t-case is. The thing that is weird is that it is very intermiitent. It went 4 months, there was nothing. Then there was a puddle overnight, not just a little stain that bled out, like a standing puddle maybe 5 in dia. Then it goes for a long time with no leaks. Well the other day it happened again, but the weird thing is the oil looked to have anti freeze in (greenish stuff that was seperated from the oil). What could be the deal? Thanx.