As before, a side-opening 'butterfly' hood was standard, but a forward tilting fiberglass hood became an option for the first time. As with its predecessor, the 900-series shared the chassis of the Kenworth cabover, replacing the 'Bullnose' Kenworth COE with the Kenworth K100. In 1956, Kenworth introduced the 900-series conventional-cab truck, replacing the 500-series introduced in 1939. The W900 is manufactured at Kenworth's main manufacturing facilities in Renton, Washington and Chillicothe, Ohio. Introduced in 2018, the Kenworth W990 was developed to complement the W900 line.

The model line also became a popular basis for truck customization, with owners adding additional chrome trim, wheels, lighting, and paint. In line with the Peterbilt 379 (from PACCAR sister division Peterbilt), the W900 gained a following among owner-operator drivers.

As the Kenworth model line was expanded, the W900 became its flagship conventional, with its cab structure used across other model families the model line competed against a wide variety of model lines through its production. Īt its introduction, the W900 conventional was introduced alongside the K100 COE. The 'W' in its model designation denotes Worthington, one of the two founders of Kenworth. The replacement of the 900-series conventional, the W900 is produced as a Class 8 conventional-cab truck primarily for highway use. The Kenworth W900 is a model line of conventional-cab trucks that are produced by the Kenworth division of PACCAR.

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