The RAM 2500/3500 Crew Cab Long II (DT facelift, introduced in 2025) represents the latest iteration of Ram’s heavy-duty pickup truck lineup. This particular variant features the 6.7-liter Cummins High Output (HO) diesel engine paired with the TorqueFlite eight-speed automatic transmission. Positioned as a high-performance offering within the 2500 and 3500 series, it caters to buyers needing substantial towing and hauling capabilities without sacrificing refinement. The 2025 facelift brought updated styling, enhanced technology, and refinements to the powertrain for improved efficiency and durability.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Crew Cab Long II (DT, facelift 2025) |
| Type (Engine) | 2500 6.7 Cummins HO (430 Hp) TorqueFlite |
| Start of production | 2025 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5-6 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 7.9 kg/Hp, 125.8 Hp/tonne |
| Weight-to-torque ratio | 2.3 kg/Nm, 426.6 Nm/tonne |
| Power | 430 Hp @ 2800 rpm |
| Power per litre | 64.3 Hp/l |
| Torque | 1458 Nm @ 1800 rpm (1075.37 lb.-ft. @ 1800 rpm) |
| Maximum engine speed | 3200 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Cummins |
| 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 |
| Valvetrain | OHV |
| Engine oil capacity | 11.3 l (11.94 US qt | 9.94 UK qt) |
| Coolant | 22.5 l (23.78 US qt | 19.8 UK qt) |
| Kerb Weight | 3418-3426 kg (7535.4 – 7553.04 lbs.) |
| Max. weight | 4491-4622 kg (9900.96 – 10189.77 lbs.) |
| Max load | 1073-1196 kg (2365.56 – 2636.73 lbs.) |
| Trunk (boot) space – minimum | 2100 l (74.16 cu. ft.) |
| Fuel tank capacity | 121 l (31.96 US gal | 26.62 UK gal) |
| Permitted trailer load with brakes (12%) | 9072 kg (20000.34 lbs.) |
| Length | 6626 mm (260.87 in.) |
| Width | 2120 mm (83.46 in.) |
| Height | 1983 mm (78.07 in.) |
| Wheelbase | 4293 mm (169.02 in.) |
| Front track | 1735 mm (68.31 in.) |
| Rear (Back) track | 1729 mm (68.07 in.) |
| Ride height (ground clearance) | 185 mm (7.28 in.) |
| Minimum turning circle (turning diameter) | 16.3 m (53.48 ft.) |
| Front brakes | Ventilated discs, 359.9×39.1 mm |
| Rear brakes | Ventilated discs, 357.9×34 mm |
| Number of gears and type of gearbox | 8 gears, automatic transmission TorqueFlite |
Powertrain & Engine Architecture
At the heart of this RAM 2500/3500 variant lies the Cummins 6.7-liter inline-six diesel engine. This engine, designated as the “High Output” (HO) version, produces 430 horsepower at 2800 rpm and a substantial 1458 Nm (1075 lb-ft) of torque at 1800 rpm. The engine utilizes a robust cast iron block and head, designed for longevity and high-stress applications. The fuel system employs a high-pressure common rail direct injection system, optimizing fuel delivery for both power and efficiency. The engine features an overhead valve (OHV) valvetrain, a design choice prioritizing durability and low-end torque. A turbocharger with an intercooler further enhances performance by increasing air intake density. The engine is longitudinally mounted within the chassis, driving the rear wheels.
The TorqueFlite eight-speed automatic transmission is specifically calibrated to handle the Cummins engine’s immense torque output. This transmission features electronically controlled shifts and a wide gear ratio spread, optimizing both acceleration and fuel economy. The transmission is known for its smooth operation and durability, crucial for heavy-duty applications.
Driving Characteristics
The 6.7L Cummins HO with the TorqueFlite transmission delivers a commanding driving experience. While not as quick off the line as gasoline-powered alternatives, the diesel engine’s massive torque reserves provide effortless acceleration, particularly when towing or hauling heavy loads. The eight-speed transmission keeps the engine within its optimal power band, contributing to responsive performance. Compared to lower-output Cummins variants, this HO version offers a noticeable increase in power, making it ideal for demanding tasks. Compared to the standard output Cummins, the HO version feels significantly more potent when fully loaded. The automatic transmission, while smooth, may not offer the same level of driver engagement as a manual transmission, but it simplifies operation in stop-and-go traffic and during long-distance towing.
Equipment & Trim Levels
The 2025 RAM 2500/3500 with the 6.7L Cummins HO and TorqueFlite transmission is typically available in higher trim levels, such as Laramie, Longhorn, and Limited. Standard features generally include a premium interior with leather upholstery, heated and ventilated front seats, a large touchscreen infotainment system with navigation, and advanced safety technologies like adaptive cruise control and lane departure warning. Optional extras can include a premium sound system, a sunroof, and various appearance packages. The Crew Cab configuration provides ample space for passengers, making it suitable for both work and family use.
Chassis & Braking
The RAM 2500/3500 utilizes a heavy-duty chassis designed to withstand the stresses of heavy towing and hauling. The front suspension features coil springs and a rigid axle with a transverse stabilizer bar, while the rear suspension employs a similar configuration. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. Anti-lock brakes (ABS) are standard. The robust suspension and braking systems are tuned to provide a comfortable ride even when the truck is heavily loaded. The rear axle ratios are optimized for towing, balancing power delivery with fuel efficiency.
Market Reception & Comparison
The RAM 2500/3500 with the 6.7L Cummins HO engine has consistently received positive reviews for its powerful performance, refined ride, and impressive towing capabilities. Critics praise the engine’s torque output and the transmission’s smooth operation. Compared to competitors like the Ford Super Duty and Chevrolet Silverado HD, the RAM often stands out for its comfortable interior and advanced technology features. Fuel economy, while improved in the 2025 model, remains a consideration for some buyers, as diesel engines typically offer lower fuel efficiency than gasoline engines. However, the Cummins HO’s increased power and towing capacity often outweigh this concern for those who regularly haul heavy loads.
Legacy
The Cummins 6.7-liter engine has established a strong reputation for reliability and longevity. Properly maintained, these engines can easily exceed 240,000 kilometers (150,000 miles) with minimal issues. The TorqueFlite transmission is also known for its durability. On the used car market, RAM 2500/3500 models equipped with this powertrain command a premium price due to their proven performance and reliability. The 2025 facelift further enhances the truck’s appeal, ensuring its continued popularity among heavy-duty truck buyers.
