Nick is right on with the diffy cooler connections. Why not vent it off the small top plug hole ? The hose I have coming off the fill plug hole shows a slight discoloration for about 2 inches and then there are no signs that the
oil has been pushed any higher. It works for now. Stupid part is that I have to disconnect it to check lube level.
Nick, have you installed coolers and if so who's parts have you had success with ???