Their are 2 hoses up to the steering stem that are just vents. One comes from the coolant jug for overflow of coolant.
Another is a vent for the transmission oil, it should T under the tank and one end go to the front of the clutch cover and the other the the very rear under the motor mount.
If the rear one is pinched or clogged, oil will be pushed out the other one when the trans is pressurized, even from when the oil gets hot and expands, it could siphon out.