I have a 2002 Jeep Liberty, 6-cyl. automatic, 4WD. I am losing transmission fluid (1/2 qt. per 1.5 weeks). There is no leak externally (no fluid on the driveway, no fluid underneath even painted the bottom) and no fluid in the diff. Further, coolant is green not the color of a strawberry milkshake. So, where can it be going?(Not foaming back up through the fill tube because all above is dry as well.) Took it to a local tranny specialist and he is without a clue. HELP!!!