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      On-Highway & Transportation



      Stewart & Stevenson serves the on-highway & transportation industry with industry leading Detroit and Mercedes engines and Allison automatic transmissions. Partnering with Allison Transmission, we offer transmissions to complete your on-highway transportation needs.

       On-Highway & Transportation Equipment


      Engines

      Partnering with Daimler Trucks North America, Stewart & Stevenson offers the Detroit family of powertrain components that continue the 70-year legacy of Detroit Diesel.
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      Transmissions

      Stewart & Stevenson, an authorized distributor of Allison Transmission since 1973, provides fully automatic transmissions.
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      青青草AV国产精品