page_title: International S series (bus chassis)
section_title: 3600
hierarchical_section_title: International S series (bus chassis) / Second generation (3800; mid-1989–2004) / Variants / 3600
caption_attribution_description: English: Image created by georgewuzheer.
context_page_description: The bus chassis variant of the International S series is a cowled bus chassis that was produced by International Harvester from 1979 to 2004. Produced primarily for school bus applications, the chassis was also produced for other applications, including commercial-use buses and cutaway-cab buses. In addition, the cowled chassis formed the basis for front-engine and rear-engine stripped chassis produced for bus applications.
  Designed as a replacement for the International Loadstar bus chassis, the S-series bus chassis was produced in two distinct generations. Matching the development of the International S series, during 1989, the model line underwent a major update, becoming the International 3800. In 2004, the International 3800 ended production, replaced by the International 3300. In production for over 25 years, the S-series bus chassis was the longest-lived model line ever produced by International and the final Navistar product line developed by International Harvester.
context_section_description: Introduced in 1991, the 3600 was a chassis custom-designed for manufacturer Thomas Built Buses for its Thomas Vista product line.  Designated a semi-forward control design, the Vista combined design elements of conventional and forward control school buses.  
  The 3600 chassis borrowed elements and its overall configuration from Navistar step van chassis, adapting other components from the 3800.  In comparison to the 3800, the driver of the Vista sat further forward (shifted nearly atop the front axle instead of behind it).  In line with a transit-style bus, the driver sat next to much of the engine; access from the front was also maintained via a tilting hood (shortened in length by nearly half).  Both the 7.3L/T444E V8s and the DT inline-6 engines were offered.  
  As the 3600 chassis was developed alongside the 1991 update for the Thomas Vista body, it was never used on another product line.  Following the purchase of Thomas Built Buses by Freightliner, the Thomas Vista was discontinued after 1998 production; elements of its design were adopted into the Thomas Saf-T-Liner C2.
caption: Thomas Vista, the bus body paired with the International 3600 chassis
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