Join Date: Nov 2001
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Re: Fluid spewing out vent on D300
Fluids from the tranny and the t-case can flow from one to the other if the seals are bad. I don't know what tranny you are running. I'm running a T-176 with a D300. In the rear face of the factory adapter, there is a cavity. When I separated the D300 from the tranny, the cavity was dry and so was the front of the D300. So, the D300 is sealed and the tranny has a seal that the nose of the D300 female spline slips into.
Even if both seals went bad, the cavity would have to fill before any fluids flowed from one to the other. Even if the fluids were to flow from one to the other, I couldn't see it being a problem. I'd have to measure, but I think both fill plugs are at about the same level. Even if one leaked into the other, since neither case is full, I can't see it getting pumped out the vent tube.
I'm hoping you are mistaken about it coming out of the vent tube. Clean it all up and see where it's coming from for sure. If it's truly coming out of the tube the only thing I can think of is that water got in the tube and completely filled the t-case. It's not a good thought. Pull the fill plug and see if anything comes out.