Yup. The 4520 has 7300 hrs on it, and will do it. As far as I know, the 2010, wouldn't do it because it's transmission was entirely different than the 30-4010. The 10 series had the extra notch from the factory, but when reports came in about accidents happening due to the high speed of 7R, Deere changed it when they introduced the 20 series. (in the transmission anyway) there's just as many reverse gears as there are high range forward gears (3R, 5R, 7R, and actually 8R). Just to prove a point to me when I was a lil schaffer, dad took the cowl off the 4010 we had, disconnected the one shift linkage and slipped the trans into 8R. He only slipped the clutch, just to make it move a foot or so, he never let it fully engage. Then he shut off the engine, and put it back to normal. He then explained to me why the 4020's and anything newer with a Synchro-Range only had 3R and 5R. Another safety/convenience change that happened during the 10-20 series changeover was moving the PTO lever from the left to the right side to avoid getting caught on it when getting off the tractor.