It works just fine on both our 9670s, no excessive wheel turn. Have you adjusted the steering sensitivity in the Original Greenstar Display->setup->AutoTrac side of it or just in the GS2 pro->Guidence? Just a side note to all the guys looking at rowsence... since we have 2 combines and they cant share adaptive curve guidance lines the one question that i asked to all the Deere guys that i could was "Will it guide the combine without an autotrac line using just the sensors only?" No one could tell me but now i know, YES it will and it works great