2017 Ram 3500 6.7 Cummins Specs 2026 Factory Data
Quick Answer
The 2017 Ram 3500 6.7L Cummins turbo-diesel produces up to 385 hp and 900 lb-ft of torque when paired with the Aisin heavy-duty transmission. Maximum towing capacity reaches 31,210 lbs in properly equipped configurations. The most critical caveat for these trucks is that specific payload and towing limits depend strictly on your truck’s unique GCWR, cab style, axle ratio, and the specific data listed on your driver-side door jamb sticker.
The 2017 Ram 3500 6.7 Cummins remains a benchmark in heavy-duty towing, but its actual performance capabilities depend entirely on your specific powertrain configuration. Many owners conflate the standard-output and high-output performance tiers, leading to inaccurate towing expectations and potential service oversights. In this guide, we provide the definitive 2017 Ram 3500 6.7 Cummins specs, including transmission-dependent performance data, engineering architecture, and critical emissions maintenance requirements. Always verify your specific vehicle’s capacities by referencing the factory door pillar sticker, as trim level, bed length, and axle gearing significantly alter your truck’s certified Gross Vehicle Weight Rating (GVWR) and payload capacity.
This data reflects 2017 model-year specifications for the 6.7L Cummins I6 across all trim levels (Tradesman, SLT, Big Horn, Laramie, Longhorn, Limited). Last reviewed: August 2026. Always confirm specific towing limits via your VIN-specific payload sticker.
| Transmission | Horsepower | Torque | Notes |
|---|---|---|---|
| 68RFE (Auto) | 370 hp @ 2800 RPM | 800 lb-ft | Standard output configuration |
| Aisin AS69RC | 385 hp @ 2800 RPM | 900 lb-ft | High-output configuration |
| G56 (Manual) | 350 hp @ 2800 RPM | 660 lb-ft | Limited availability; lower rating |
Decoding 2017 Ram 3500 6.7 Cummins Specs and Data
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How to Read Your Ram 3500 Data Plate
The most critical factor in determining your truck’s actual capability is the manufacturing data plate located on the driver-side door jamb. While the 6.7L engine provides the power, your GCWR (Gross Combined Weight Rating) is physically limited by the axle ratio, suspension configuration, and wheel/tire package. Never rely on general brochure towing numbers when calculating load safety; verify your specific VIN against the factory-provided tow guide to ensure you remain within the chassis engineering limits.
Understanding Transmission Torque Variations
The 2017 Ram 3500 6.7 Cummins engine management system utilizes different torque maps based on the transmission detected by the ECU. The 68RFE, while robust for daily work, is software-limited to 800 lb-ft to protect internal clutches. The Aisin AS69RC transmission, however, is a commercial-grade unit engineered to handle the full 900 lb-ft of torque generated in the high-output tune. Choosing the wrong transmission for your intended towing load is a common pitfall; if you plan to tow at max GCWR regularly, the Aisin provides superior thermal management and structural longevity.
Engineering Architecture of the 6.7L Cummins
Architecture of the 6.7L Cummins Inline-6
The engine is built around a heavy-duty cast iron block designed for extreme longevity under high thermal stress. Internally, it features a forged steel crankshaft and connecting rods that facilitate the high cylinder pressures required for massive low-end torque. Unlike V8 configurations found in competing trucks, the inline-6 architecture provides a longer combustion stroke, which is mathematically advantageous for generating peak torque at lower, more efficient RPMs.
Functionality of the VGT and Common Rail System
The Variable Geometry Turbocharger (VGT) is central to the engine’s performance. By adjusting the vane angle, the VGT manages boost pressure and exhaust gas temperature with high precision, eliminating turbo lag while maintaining efficiency. Coupled with a high-pressure common rail injection system, the 2017 Cummins maintains optimal fuel atomization throughout the entire load range. This allows the engine to deliver consistent power even under harsh conditions, provided that the fuel system is maintained with proper filtration.
900 lb-ft
385 hp
Emissions Maintenance for 2017 Cummins
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Diesel Exhaust Fluid (DEF) Requirements
The Selective Catalytic Reduction (SCR) system uses Diesel Exhaust Fluid to convert nitrogen oxides into nitrogen and water. Ignoring DEF levels will eventually trigger a vehicle derating process, limiting speed and power until the fluid is replenished. Always use API-certified DEF; contaminated or expired fluid can lead to catastrophic damage to the sensitive injection nozzles within the exhaust stream.
DPF and SCR Maintenance Best Practices
The Diesel Particulate Filter (DPF) traps soot, which is then burned off during active “regeneration” cycles. These cycles require the engine to reach specific exhaust temperatures. If you operate the truck primarily for short, stop-and-go trips, the system may struggle to complete these cycles, potentially clogging the filter. Never bypass these systems; doing so violates federal emissions standards and often results in irreparable damage to the VGT and engine management sensors.
Verifying Your 2017 Ram 3500 Configurations
Use the Mopar VIN lookup tool to generate your truck’s original factory build sheet, which specifies the transmission and rear axle ratio installed at the factory.
The Aisin transmission pan has a distinct rectangular shape with a drain plug, whereas the 68RFE pan is less uniform and typically lacks a factory drain plug.
Performance Comparison: Heavy-Duty Competitors
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Cummins Inline-6 vs Ford Power Stroke V8
The Cummins inline-6 design excels at low-RPM torque production, which is ideal for heavy towing and starting from a stop on steep grades. While the Ford Power Stroke V8 offers competitive horsepower and is often perceived as having a broader power band, the Cummins remains the preferred choice for those prioritizing raw, persistent lugging ability.
Cummins Inline-6 vs GM Duramax V8
The Duramax V8 is known for its smooth delivery and refined characteristics. However, the Cummins remains a simpler, more robust platform for long-term maintenance. The inline-6 layout allows for easier access to engine-bay components, making the 2017 Ram 3500 a favorite among owners who perform their own routine service.
Modifying engine output through aftermarket tuning will void factory warranties and can place dangerous stress on the 68RFE transmission, which is not built for 900+ lb-ft of torque.
In summary, the 2017 Ram 3500 6.7 Cummins is a highly capable machine, provided you respect the engineering boundaries of your specific transmission and axle setup. Always identify your transmission (68RFE vs. Aisin) to understand your true torque rating. Consult your owner’s manual for strict adherence to DEF, DPF, and oil service intervals to ensure the longevity of your engine. For any critical towing tasks, verify your payload sticker—this is the final authority on what your specific truck can safely handle.
2017 Ram 3500 6.7 Cummins Specs: Frequently Asked Questions
What is the difference between the 68RFE and Aisin transmissions?
The 68RFE is the standard automatic transmission for the 6.7 Cummins, rated for lower torque (800 lb-ft). The Aisin AS69RC is an optional heavy-duty commercial-grade transmission required for the ‘High Output’ configuration, allowing the engine to reach its full 900 lb-ft of torque rating. The Aisin is designed for more frequent heavy-load cycling and possesses distinct gear ratios better suited for maximum towing capacity.
Does the 2017 6.7 Cummins require DEF?
Yes. The 2017 6.7L Cummins utilizes a Selective Catalytic Reduction (SCR) system that requires Diesel Exhaust Fluid (DEF) to meet emissions standards. The DEF tank is located near the fuel tank, and the system monitors fluid levels, providing alerts when replenishment is needed. Neglecting to refill the DEF tank will result in limited vehicle speed and eventually prevent the engine from restarting.
What is the towing capacity of the 2017 Ram 3500?
The maximum towing capacity for a 2017 Ram 3500 is 31,210 lbs when configured with a Regular Cab, Dual Rear Wheel (DRW) setup, 4×2 drivetrain, and the Aisin transmission. However, this is a theoretical maximum. Every truck’s individual towing capacity is limited by its specific Gross Combined Weight Rating (GCWR) and curb weight; therefore, you must check the door jamb sticker for your specific vehicle’s payload and towing limit.
Is the 2017 model year considered reliable?
The 2017 Ram 3500 is generally viewed as a reliable workhorse. The 6.7L Cummins engine is a proven platform known for longevity. Reliability often hinges on proper maintenance of the emissions system (DEF/DPF) and the transmission. Owners who adhere to strict oil change intervals and fuel filter replacements typically experience fewer issues with the high-pressure common rail injection system and related electronic components.
How do I find the axle ratio for my 2017 Ram 3500?
You can determine your axle ratio by looking at the ‘Build Sheet’ for your specific VIN. If you do not have the build sheet, you can request one from a Ram dealership using your VIN. Alternatively, there is often a metallic tag attached to the differential cover on the axle itself that lists the gear ratio, or you can perform a ‘driveshaft rotation’ test if the tag is unreadable.
