This might or might not be of some help . My truck has just one electric wiper motor on the drivers side . The passenger side motor was an option . I installed a NOS motor and I had the same problem with the wiper blade pushed up slightly on the roof , but not straight up . I jerry rigged a stop using the mounting post on the outside of the truck as a stopping post . It doesn't look very pretty , and I am not proud of it , but it works for that purpose . My blade was only pushed up by the wind at highway speed ( 65 MPH ) on the outside of the window . As for your motor turning too freely , I don't know . Do you have a wiper blade on the motor that contacts the glass as much as possible for resistance ?