My bet is that the books are correct. Mine went in the other direction because the hub was touching the pilot bushing. Mine is probably backwards, but it has worked flawlessly for many years. Take a real close look to make sure nothing is rubbing. Also, make sure the clutch disk slides freely on the input shaft of the transmission. If it is snug at all, it may not be backing off the flyweel when the clutch is disengaged.