The RAM 2500/3500 Regular Cab II (DT) series, specifically the 3500 model equipped with the 6.7-liter Cummins turbocharged diesel engine producing 400 horsepower and paired with an Aisin automatic transmission and Dual Rear Wheels (DRW), represents a significant offering in the heavy-duty pickup truck segment. Introduced for the 2019 model year and continuing through 2025, this configuration caters to buyers requiring substantial towing and payload capacity. It occupies a position within the RAM lineup geared towards commercial users, agricultural applications, and those needing a robust work truck, differentiating itself from lighter-duty RAM 1500 models and higher-trim 2500/3500 variants focused on luxury and refinement.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Regular Cab II (DT) |
| Type (Engine) | 3500 6.7 Cummins TD (400 Hp) Automatic DRW |
| Start of production | 2019 |
| End of production | 2025 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 2-3 |
| Doors | 2 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 8.4 kg/Hp, 118.7 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 321.7 Nm/tonne |
| Power | 400 Hp @ 2800 rpm |
| Power per litre | 59.8 Hp/l |
| Torque | 1084 Nm @ 1800 rpm (799.52 lb.-ft. @ 1800 rpm) |
| Maximum engine speed | 3200 rpm |
| Engine layout | Front, Longitudinal |
| Engine displacement | 6690 cm3 (408.25 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 107 mm (4.21 in.) |
| Piston Stroke | 124 mm (4.88 in.) |
| Compression ratio | 16.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Coolant | 20.8 l (21.98 US qt | 18.3 UK qt) |
| Kerb Weight | 3370 kg (7429.58 lbs.) |
| Max. weight | 6350 kg (13999.35 lbs.) |
| Max load | 2980 kg (6569.78 lbs.) |
| Trunk (boot) space – maximum | 2115 l (74.69 cu. ft.) |
| Permitted trailer load with brakes (12%) | 15286 kg (33699.86 lbs.) |
| Length | 5892 mm (231.97 in.) |
| Width including mirrors | 2450 mm (96.46 in.) |
| Height | 1976 mm (77.8 in.) |
| Wheelbase | 3560 mm (140.16 in.) |
| Front track | 1769 mm (69.65 in.) |
| Rear (Back) track | 1927 mm (75.87 in.) |
| Ride height (ground clearance) | 269 mm (10.59 in.) |
| Minimum turning circle (turning diameter) | 13.8 m (45.28 ft.) |
| Approach angle | 16.6° |
| Departure angle | 23.6° |
| Ramp-over (brakeover) angle | 19.7° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Aisin |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Leaf spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 275/70 R18 E; 285/60 R20E |
| Wheel rims size | 8.0J x 18; 8J x 20 |
Powertrain & Engine Architecture
The heart of this RAM 3500 is the 6.7-liter Cummins inline-six diesel engine. This engine, designated with various codes throughout its evolution, is a cornerstone of the heavy-duty truck market. The 400 horsepower and 1084 Nm (799.52 lb-ft) of torque are achieved through a sophisticated turbocharging system, intercooling, and high-pressure common-rail fuel injection. The common-rail system allows for precise fuel delivery, optimizing combustion efficiency and reducing emissions. The engine features a cast iron block and head, known for their durability and longevity. The Aisin six-speed automatic transmission is specifically designed to handle the immense torque output of the Cummins engine. It’s known for its robustness and smooth shifting characteristics, crucial for heavy towing and hauling. The transmission features electronically controlled shifting and tow/haul modes to optimize performance under load.
Driving Characteristics
The 400 hp/1084 Nm combination delivers substantial performance, even with the weight of a heavy-duty truck. Acceleration is brisk, and the engine provides ample power for merging onto highways and maintaining speed while towing. The Aisin transmission’s gear ratios are well-suited for both everyday driving and demanding work tasks. Compared to lower-output Cummins variants, this 400 hp version offers a noticeable increase in responsiveness and pulling power. While not as fuel-efficient as the lower-powered engines, the trade-off in performance is often considered worthwhile for those requiring maximum capability. Compared to gasoline-powered RAM 2500/3500 models, the diesel offers significantly more torque at lower RPMs, making it ideal for towing heavy loads.
Equipment & Trim Levels
The 3500 Regular Cab DRW with the 6.7L Cummins typically falls into a mid-range to upper-mid-range trim level, often designated as the “Tradesman” or “Big Horn/Laramie” depending on optional packages. Standard equipment generally includes air conditioning, a basic infotainment system with a touchscreen display, vinyl upholstery, and a heavy-duty suspension. Optional extras could include upgraded infotainment systems with navigation, leather upholstery, heated and ventilated seats, a premium sound system, and various driver-assistance features like blind-spot monitoring and rear cross-traffic alert. The Regular Cab configuration prioritizes functionality and work-oriented features over luxury, offering a spacious interior for two or three occupants.
Chassis & Braking
The chassis of the RAM 3500 is built for durability and strength. The frame is fully boxed and constructed from high-strength steel. The front suspension utilizes an independent multi-link setup for improved ride quality and handling. The rear suspension employs a traditional leaf spring design, optimized for heavy load carrying. The DRW configuration (Dual Rear Wheels) significantly increases stability and load capacity. Braking duties are handled by disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. The braking system is sized appropriately for the truck’s weight and towing capacity.
Market Reception & Comparison
The RAM 3500 with the 6.7L Cummins and Aisin automatic received generally positive reviews from automotive critics. It was praised for its powerful engine, robust transmission, and impressive towing and payload capabilities. Fuel economy, while not exceptional, was considered acceptable for a heavy-duty diesel truck. Compared to competitors like the Ford Super Duty and Chevrolet Silverado/GMC Sierra 3500, the RAM 3500 was often lauded for its comfortable ride quality and refined interior. Reliability has been generally good, although diesel engines can be more expensive to maintain than gasoline engines due to the complexity of the fuel injection system and emissions controls.
Legacy
The 6.7L Cummins engine has established a strong reputation for reliability and longevity. Properly maintained, these engines can easily exceed 320,000 kilometers (200,000 miles) with minimal issues. The Aisin transmission is also known for its durability. On the used car market, these RAM 3500 models hold their value well, particularly those with lower mileage and well-documented maintenance histories. The combination of power, capability, and reliability makes this configuration a desirable choice for buyers seeking a heavy-duty truck for work or recreational purposes. The DRW configuration further enhances its appeal to those requiring maximum towing capacity and stability.
