2015 Ram 3500 Towing Capacity & Payload

The 2015 Ram 3500 is a heavy-duty truck designed for serious towing and hauling, with a maximum towing capacity of up to 30,000 pounds when properly equipped.

Quick Answer

• Max Towing Capacity: 30,000 lbs (conventional), 30,000 lbs (5th-wheel/gooseneck)
• Max Payload: 7,390 lbs
• Gross Vehicle Weight Rating (GVWR): 10,000–14,000 lbs
• Gross Combined Weight Rating (GCWR): 20,000–37,600 lbs
• Curb Weight: 6,364–8,506 lbs
• Hitch Class: Class IV (bumper hitch), Class V (frame-mounted receiver), Gooseneck/5th-Wheel Prep

Tow Ratings by Engine & Trim

Determining the exact towing capacity for your 2015 Ram 3500 depends on the engine, drivetrain, rear axle ratio, cab configuration, and bed length. The 2015 Ram 3500 primarily offered three engine options, all designed for robust performance.

Note: These figures are approximations. Always refer to the specific vehicle's door jamb sticker for precise towing and payload capacities, as configurations can vary significantly.

Tow Package Contents

Ram offered several features to enhance the towing capability and safety of the 3500, often bundled into a "Max Tow" or "Heavy Duty Towing" package, or available as standalone options:

• Transmission Cooler: Essential for heavy towing, this helps maintain optimal transmission fluid temperatures, prolonging the life of the transmission.
• Integrated Trailer Brake Controller (ITBC): This factory-installed system allows for direct control over the electric brakes of a trailer, providing smooth and proportionate braking. It's a significant upgrade over aftermarket controllers.
• Trailer Sway Control (TSC): Utilizing the vehicle's stability control system, TSC can detect and mitigate trailer sway by applying individual wheel brakes and/or reducing engine power, helping drivers maintain control in adverse conditions.
• 7-Pin Wiring Harness: Provides dedicated connections for trailer lights (running, brake, turn signals), electric brakes, and auxiliary power.
• Heavy-Duty Receiver Hitch: Depending on the configuration, the Ram 3500 came with a robust Class IV or Class V receiver hitch, designed to handle substantial tongue weights.
• Upgraded Axle Ratios: Often, towing packages included lower (numerically higher) axle ratios, providing greater torque for pulling heavy loads.

5th-Wheel & Gooseneck Towing

As a heavy-duty truck, the 2015 Ram 3500 is very well-suited for 5th-wheel and gooseneck towing, which allows for significantly higher capacities than conventional bumper pulling. The Ram 3500, especially with the Aisin automatic transmission and High-Output Cummins engine, was capable of 5th-wheel/gooseneck towing capacities reaching up to 30,000 pounds.

Many 2015 Ram 3500 models were available with an optional factory-installed "Ram Box Cargo Management System" in-bed system, which included a integrated gooseneck and 5th-wheel prep package. This system provides mounting points for a gooseneck ball and various 5th-wheel hitches without requiring aftermarket drilling.

Weight Distribution & WDH Requirements

For conventional towing with a tongue weight exceeding 1,000 lbs (or a trailer Gross Trailer Weight (GTW) over 10,000 lbs), a Weight Distributing Hitch (WDH) is generally recommended. A WDH helps distribute the trailer's tongue weight more evenly across all axles of the tow vehicle and trailer, improving stability, handling, and braking performance by restoring proper suspension geometry and preventing excessive squat at the rear of the truck. Always consult your owner's manual for specific WDH requirements and recommendations based on your trailer's weight and the truck's configuration.

Real-World Towing Tips for This Vehicle

• Know Your Weights: Before every trip, know your trailer's Gross Trailer Weight (GTW), tongue weight, and the combined Gross Combined Weight (GCW) of your truck and trailer. Never exceed the GCWR, GVWR, GAWR (Gross Axle Weight Rating), or tire load ratings.
• Pre-Trip Inspection: Check trailer tires, lights, brakes, and all connections. Ensure the hitch is properly secured and safety chains are crossed.
• Proper Loading: Load your trailer with about 10-15% of the total weight on the tongue for conventional trailers, and 15-25% for 5th-wheel/gooseneck trailers. This helps prevent sway.
• Drive Conservatively: Allow more space for stopping, accelerate gradually, and take turns wider. Avoid sudden maneuvers.
• Monitor Temperatures: Keep an eye on your engine oil, transmission fluid, and coolant temperatures, especially on long grades or in hot weather. The Ram 3500's factory gauges and optional consult screen are valuable tools.
• Trailer Brakes: Adjust your integrated trailer brake controller for smooth, synchronized braking with the truck.

Common Towing-Related Issues

While the Ram 3500 is a highly capable tow vehicle, some common issues or areas to monitor include:

• Transmission Overheating: While the factory transmission cooler is effective, extremely heavy loads or prolonged uphill climbs can still stress the transmission. Monitor temperatures and consider an aftermarket cooler if routinely pushing the limits.
• Brake Wear: Towing heavy loads significantly increases wear on brake components. Regular inspection and maintenance of brake pads and rotors are crucial.
• Tire Pressure: Incorrect tire pressure on both the truck and trailer can lead to instability and increased wear. Always ensure tires are inflated to the recommended pressures for towing.
• Suspension Sag: Even with heavy-duty springs, extreme tongue weights can cause some rear-end sag. Properly set up a WDH, or for 5th-wheel/gooseneck, ensure your truck's suspension is adequate for the pin weight. Airbag helper springs can be an excellent addition for fine-tuning ride height and stability.

Note on SAE J2807: For 2015, manufacturers were in the process of adopting the SAE J2807 towing standard, which provides a uniform method for calculating tow ratings across brands. While Ram provided J2807-compliant ratings for some configurations, it's possible older, pre-J2807 methodologies were still in use for others. Always refer to the specific vehicle's documentation or door jamb sticker for the most accurate and certified ratings.

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