At the end of 1975, the 1000 series was replaced by the 600 series models. In the lineup, two models replaced the former 5000: the 5600 with 68 hp and the 6600 with 77 hp. The transmission in the 1000 series was the familiar non-synchronized 8+2, which had the drawback of lacking a fast cultivation gear: the top speed of the six-cylinder was 12 km/h. As an accessory, there was a reducing Dual Power quick shift, whose control lever had been moved to the right on the dashboard. The lift cylinders on the four-cylinder models were larger than before, and hydraulic oil filtration had been improved. The Ford 6600 was the best-selling tractor model in Europe throughout its entire production history.

In the summer of 1976, the new Q cab was completed, representing the best of its time. The cab was factory-installed but manufactured by GKN Sankey. In 1978, four-wheel-drive models equipped with ZF front axles were introduced. They featured a limited-slip differential, engageable four-wheel drive while moving, and a 10.7-meter turning radius in the 6600 model.

In the 1980 models, the lifting capacity of both the 5600 and 6600 was increased from earlier versions. At the end of 1980, the 4.2-liter engine in the 6600 and 7600 was enlarged to 4.4 liters.

There was also a six-cylinder conversion of this model series made by the Belgian company EVA, marketed under the designation 7095. It was sold, among other places, in Germany. The 7095 was also, in many respects, less well-equipped than the 7600.

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