95 legacy, center heat/air vent that controls airflow into the cab is jamming at one point
the vent gets stuck at one position. the actuator is ok, goes to all 5 positions. With the
actuator removed, I can move the plastic linkage that operates the vent door by hand,
and I feel the place where it gets jammed. I can get it to move past the tight spot, but it's
too tight for the actuator to do it. Any guess what to try next?