Dodge Durango 2002. Driver's side power seat moves on one side, but the other is stuck.?

[pluto]

Does this sound like there is something caught on the track. I'm not sure if the power seat has two motors or one. The seat moves in all directions but forward. The right side of the seat starts to slide forward, but the left side just sits as if it is stuck.

 

[revman]

unbolt the seat to get a better look underneath