2026 Western Star 49X

Application fitment centers on heavy vocational and short to mid-range haul, day cab layout and 465 miles point to a fresh chassis with no meaningful duty cycle history yet. Class 8 GVWR listed at 58,180, tandem 6x4 and 40k rears support high gross work where traction and axle capacity matter more than sleeper comfort. Powertrain pairing is Cummins ISX15 rated 605 hp tied to an Eaton-Fuller Endurant AMT with 18 speeds. Driveline spec reads like a high-torque setup intended for steep grades, heavy starts, and wide operating range, with air ride suspension aimed at keeping the ride controlled under varying payloads. Chassis layout includes a 265-inch wheelbase and a sliding fifth wheel, useful for dialing in axle weights across different trailer kingpin settings. Wheels are aluminum, driver position is left-hand drive, fuel is diesel, exterior color is white. Identification numbers on file include serial 5KJNBWFG9TLWU8305 and stock 335334; ECM details are not provided, so no engine hours or fault history can be inferred from the data.