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The two biggies are the dipstick tube, which is relatively easy to waterproof, and the vent in the front pump, which is damnably difficult to waterproof. You may or may not have room behind the converter to tap that vent and install an elbow... I doubt there's room there to safely do it.
I have a 02 2500 dont know if it makes a differance? The vent behind the bell housing? I guess it would be a little difficult then I guess when I rebuild the tranny I could do it