The model of the unit is an EK15. It comes off the wire going forward and reverse and falls off to the right side mostly but also falls off left. Contacted Stienbach Tech. support and they sudjested to change the steer encoder on top of the drive motor as it wont stay calibrated and I have done it the past with good results. Changed the encoder and it wont stay calibrated still as it works good at first then falls off the wire. Have tripple check electrical connections and done everything the tech guy has said to do but nothing has worked. The tech. guy is fed up with me calling him so much but that is what he is there for and he is not given me anymore answers. Could be a faulty IFP card but not sure as this is an intermittant problem.