727 Hard to Roll backwards

Just so you know, even on the bench, turning the output shaft backwards, always takes more energy than forwards, and indeed, it is the sprag forcing the planetaries to rotate the sunshell, and EVERYTHING inside there is turning in one direction or another; and the clutches and the bands are supposed to be slipping. Well, how well they slip will depend on how straight/flat they are, how much or little clearance they were set up at, and if there is any foreign substance on them.