In 1978, IH introduced the combine harvester models 943 and 953. Of these, the 943 was an improved version of the earlier model 541. Above this was the 953, equipped with a turbocharged engine, longer concaves, and a larger grain tank. For the year 1981, the smaller models 321 and 431 were replaced by the 923 and 933. The growth was mainly in the engine power of the smallest model and the size of the grain tank. At the same time, the grain tank of the 943 was also increased. For the first time, a panoramic cab was now available.

IH's model range is a typical example of development: in a new lineup, the smallest model is dropped, and an ever-larger combine harvester is brought to the top. In the late 1980s, the 953 was also offered as a Hydro version. After these models, IH focused solely on Axial Flow combines.

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