The John Deere 9R series was revamped in spring 2021. The lineup still included 9R wheeled tractors, 9RT models equipped with long tracks, and 9RX models with four track units. The engines were now the new generation 13.6-liter JD14 engines. There were six power classes, the smallest of which (390) was not brought to Europe. For some reason, the power outputs of the 9RT models differed from those of the R and RX models. The engines were promised to be 50% quieter than before. The first-year 640 models still had Cummins engines, but these were replaced with the JD14 at the beginning of 2022. The transmission was a further developed e18 full powershift. The top speed in all versions was 40 km/h.

Even the smaller models now had the longer wheelbase previously reserved for the larger models. Weights had risen to over 20 tons, and over 25 tons in the RX models. The cab was now mostly the same as in the smaller 7R and 8R series. The windshield wiper was still positioned at the top, with a rather limited wiping area. The display was a 10-inch Gen 4 Command Center 4600. For precision farming features, a second similar display could be added. The base cab trim level was Select. The Premium trim included, among other things, LED work lights, an electrically adjustable seat, a 6.5-inch touchscreen audio system, and an 11-liter cooler box—a size too small for European water bottles. The Ultimate trim offered a seat with active suspension, lateral support adjustment, and massage function, as well as a fabric floor mat and leather upholstery. The RX models featured more robust and maintenance-free track systems. Fuel and AdBlue tanks were larger than before.

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