There has to be a lot of coolant in the transmission for it to be forced up through the PV rod passage, as its on the top of the cases. The pump seal is a possibility as well as the primary cover fit and/or gasket. There are two coolant passages that pass through the cases and primary cover to the pump. What happed that you had to replate the cylinder? Overheat? You have something going on there that you possibly missed.
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