Don't put a Smartraxx unit in unless they know it will work for you (best if you know someone else who has installed the unit in same type equipment) or else you wasted a bunch of money because you most likely will not get our money back.  I should have tried to sell mine on ebay when I took it out of my tractor after Raven couldn't get it working for me instead of letting them take it and supposively getting my money back - haven't seen the money yet - my dealer said I did get some back through him but still am waiting on the refund on all the pieces the Raven got back.  This has been going on since late summer. 

I my opinion I would recommend to go with any other brand of steering unit and stay away from Raven.