Water in the hydraulic oil

[Gary p]

The Hydraulic system oil keeps getting water in it and the system pushes oil out thru the transmission at the bottom of the shifter.

 

[Shadow]

It may be getting in around the shifter boot, or the vent for the transmission on the fill cap. If it sits outside a lot, that's usually the cause

 

[North Idaho Wolfman]

To get enough water in the system to force oil out the top is rather odd!
I would lean more towards sabotage than a failure, that is unless you have taken it swimming lately?
It could get some water in the vent on the top of the 3 point and maybe if the cap was left off.
I would suggest you drain all the hydraulic fluid and see how much water really is in there.