What is the towing capacity of the 6.7 Cummins Turbo Diesel?
The towing capacity is not defined by the engine alone; it depends on the vehicle it’s paired with. For the 6.7-liter Cummins Turbo Diesel used in Ram heavy-duty pickups, most configurations range from light-to-medium conventional towing on 2500 models to very high ratings on 3500 models, with exact figures varying by year, cab/bed, axle ratio, and hitch setup. Always check the door sticker or official spec sheets for your exact build.
How towing ratings are determined
What you can haul with a 6.7 Cummins is a function of more than horsepower and torque. The transmission choice, rear axle ratio, GVWR (gross vehicle weight rating), wheel configuration (single vs dual rear wheels), cab/bed combination, and the type of hitch (conventional bumper hitch vs. gooseneck/fifth-wheel) all calibrate the official tow rating. The engine provides the pulling power, but the rest of the drivetrain and chassis constrain how much trailer you can safely tow.
Overview of the limiting factors
Because the rating is a balance of several components, the same engine can have different tow ratings in different Ram configurations. The rating shown by the manufacturer assumes the truck’s GVWR and GAWR are not exceeded, the trailer is properly matched, and towing aids (brake controller, trailer sway control, etc.) are in use where required.
With these considerations in mind, the following ranges illustrate typical results across common configurations. The exact numbers for your truck may differ based on year, options, and equipment.
Rough towing ranges by Ram model (with 6.7L Cummins)
The figures below reflect common configurations in recent model years. Use them as a general guide, but verify your specific build for an exact rating.
- Ram 2500 with 6.7L Cummins Turbo Diesel: conventional towing commonly in the low-to-mid range of tens of thousands of pounds (roughly 15,000–20,000 lb) depending on axle ratio and GVWR; gooseneck/fifth-wheel capability typically adds more capacity, with exact figures varying by year and package.
- Ram 3500 with 6.7L Cummins Turbo Diesel (SRW or DRW): conventional towing commonly in the mid- to upper-30,000s of pounds (roughly 28,000–37,000 lb), with gooseneck/fifth-wheel setups able to approach or reach higher ratings on some configurations (up to around 37,000 lb or more in the best-rated packages).
These ranges are approximate and depend on the specific vehicle’s configuration, including axle ratio, cab/bed choice, and whether it’s a single- or dual-rear-wheel setup. Confirm the exact rating for your build on the placard inside the driver’s door or through Ram’s official specifications for your year and configuration.
How to verify the exact rating for your truck
The most reliable way to know your precise towing capacity is to consult the vehicle’s door jamb sticker, which lists the Gross Vehicle Weight Rating (GVWR) and the Gross Combined Weight Rating (GCWR). Your owner’s manual and Ram’s official online specs also provide VIN-specific information. If you’re planning a heavy tow, consider consulting a dealer or using Ram’s online build configurator to extract the exact rating for your exact VIN.
What to consider beyond the rating
Beyond the official tow limit, pay attention to payload capacity, trailer brakes, tongue weight, and braking systems on both the truck and trailer. Proper hitching, weight distribution, and braking controllers are essential for safe towing, especially with heavy trailers and gooseneck or fifth-wheel setups. Always ensure you stay within GCWR and GAWR limits for the entire towing package.
Summary
There isn’t a single number that defines the towing capacity of the 6.7 Cummins Turbo Diesel. The engine supports very high towing potential, but the actual rating depends on the Ram model (2500 vs 3500), configuration (SRW vs DRW), axle ratio, bed/cab setup, and hitch type. For a precise figure, check your vehicle’s door sticker or the VIN-specific Ram specifications for your year and configuration. If you share your exact truck year, cab/bed style, and drivetrain, I can help pinpoint a tighter estimate for your build.
