I don't understand the reluctance to drop the pan. It is not that hard and if you use an inch pound torque wrench not hard to reinstall correctly. Gasket is reuseable as well. You will have one hell of a time doing this job without dropping the pan. All you need is a Habor Frieght 5 buck hand pump to refill the trans until it weeps out the fill hole, start the car and once up to between 80-120F fill until it weeps out, put the plug in and you are done.
Not sure if yours takes Lifeguard 5 or 6 but both are easily available as you will loose some when you drain and drop the pan.
Esso LT 71141 and Pentosin AFT1 work for LG5 and LG6 either use LG6 or Mercon SP for fill replacements...