I don't have a 47 to poke at. But the kind folks at Novak seem to think the 47-53 are the same(includes synchros?). The torque tube changes to open after 53? Here is a link to the "Information" part of the site: https://www.novak-adapt.com/knowledge/transmissions/manual/sm420
With out one to poke and mess with this is as good as I can do.


Steve H