if you changed the fluid 15,000 miles ago, and added not 1 but 2 qts of lucas, its time has come to a end. i'd think another pan drop would just be wasted money at this point.

no one ever wants to hear they are gonna need another trans, ( sorry BTW) i didnt want to believe it either when i lost 3 rd gear in mine either.

start babying it, and save up for a used trans or a rebuild.