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Rock Auto has parts for heavy trucks, tractors, snowmobiles, boats or motorcycles. You can buy it online by using the "Part Number Search" tab if you know the part number. Rock Auto also list lights, belts, hoses, and other parts in our "Tools and  Universal Parts" tab by size.

Fiat Chrysler announced it will move production of its Ram heavy-duty trucks to its plant in Warren, Michigan. In doing so, the plant will add 2,500 new jobs. Currently, the Ram is built in Saltillo, Mexico.

According to the U.S. Department of Energy, diesel engines offer 30- to 35-percent greater fuel economy than comparable gasoline engines. Diesel fuel also has higher energy density than gasoline, which means less fuel is required to generate the same power as gas, improving overall fuel economy.

The simple answer is that full-size trucks are larger and can hold a bigger engine. Numbers do vary based on make and model, but according to Motor1 most mid-size trucks can haul 7,000 pounds and most full-size can haul over 10,000 pounds. When comparing payloads, we tend to see a little bit of the same story.

The recently updated RAM 3500 is the current towing capacity leader. With the truck's 6.7-liter Cummins diesel engine and the right drivetrain, Chrysler says the RAM 3500 can tow a whopping 30,000 pounds. That's well ahead of rivals such as the F-350 Super Duty, and the Silverado and Sierra 3500 HD.