Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
The control linkage from the foot control may have flipped over, and now the lever on the transmission may be moving in wrong direction.
SST is a one of a kind, and it is not the normal setup. But you know that. The linkage on the actuators can mess up the steering, but I don't see how it would affect F/R, but something has flipped! With you having the manuals you are way ahead, as I don't have them! Let me know what you find.