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The chassis, on the other hand, encompasses more than just the frame. It includes the entire structural framework of the vehicle, incorporating elements like the axles, suspension, steering, and braking systems. The chassis is responsible for providing stability, support, and control throughout the vehicle's performance. A well-designed chassis enhances ride quality and safety by ensuring that the vehicle can efficiently manage road conditions and driver inputs.


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The powertrain of a heavy-duty truck consists of the engine, transmission, driveshaft, and differential. Common transmission options include manual and automatic systems, with many modern trucks opting for automated manual transmissions (AMTs) that improve fuel efficiency and ease of driving. Heavy-duty trucks often come with 10 to 18-speed transmissions, providing the flexibility needed for varying terrains and load conditions.


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