im no expert but just to toss something out there.
with mopars having differances in cranks and torque converters and harmonic balancers being internal and externally balanced.....could oyu have mismatched components? and when it gets to highrevs it goes out of balance enough to shimmy some fluid passed a seal?
doubt thats the case...just and idea
maybe the trans is overfull and it squirting out because of that?