Netspeed

Something snapped in the back....the motors turn but neither of the tranmissions work. Weird thing: the right side transmission seems to be 180 degrees off. The arm that attaches to the center actually goes the wrong way when it's attached to the other arm! I disconnected the arm from the other linkage and the stop limiter (if that makes sense) stops the arm near the top of the range of motion.....any ideas? Sorry for the lengthy post.