The PayStar was introduced by International Harvester in January 1972, as a construction-specific versions of the conventional Transtar.
From 1972 through 1980 the Paystar was offered in two ranges, the 5050 with mid-range engines, and the 5070 with heavy duty engines. Available as 4×4, 6×4, and 6×6 [a], they were usually straight trucks, most offered trailer brake options. Semi-tractors were also available, the F5070 had a Gross Combination Weight Rating[b] of up to 120,000 lb (54,000 kg).
The second generation trucks were an evolution of the first, with increased weights and engine power. The plate fenders and butterfly hood were replaced with a one piece forward tilting hood. The 5500 had a forward front axle, the 5600 had a setback one, and the 5900 was a semi-tractor.
By 2013 the PayStar was normally a semi-tractor, although straight truck applications were still offered. Severe service straight truck applications were handled by the Workstar series, which offered no semi-tractors. In 2013 the PayStar is only offered as a 6×4 or 8×6 with high horsepower engines.
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