The RAM 2500/3500 Mega Cab II (DT facelift, introduced for the 2025 model year) represents the latest iteration of Ram’s heavy-duty pickup truck line. This particular variant, the 3500 model equipped with the 6.7-liter Cummins High Output (HO) diesel engine producing 430 horsepower and paired with a TorqueFlite 8-speed automatic transmission and a 4×4 drivetrain, is positioned as a premium work and towing machine. The DT generation, launched in 2019, received a significant refresh for 2025, focusing on interior upgrades, technology enhancements, and subtle exterior styling changes. This version caters to buyers needing substantial towing capacity and robust performance for demanding tasks.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab II (DT, facelift 2025) |
| Type (Engine) | 3500 6.7 Cummins HO (430 Hp) 4×4 TorqueFlite SRW |
| 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 | 8.7 kg/Hp, 115.6 Hp/tonne |
| Weight-to-torque ratio | 2.6 kg/Nm, 391.9 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 | 2 |
| 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 capacity | 22.5 l (23.78 US qt | 19.8 UK qt) |
| Kerb Weight | 3720 kg (8201.2 lbs.) |
| Max. weight | 5579 kg (12299.59 lbs.) |
| Max load | 1859 kg (4098.39 lbs.) |
| Trunk (boot) space – minimum | 1600 l (56.5 cu. ft.) |
| Fuel tank capacity | 117 l (30.91 US gal | 25.74 UK gal) |
| Permitted trailer load with brakes (12%) | 10923 kg (24081.09 lbs.) |
| Length | 6348 mm (249.92 in.) |
| Width | 1994 mm (78.5 in.) |
| Height | 2036 mm (80.16 in.) |
| Wheelbase | 4074 mm (160.39 in.) |
| Front track | 1719 mm (67.68 in.) |
| Rear (Back) track | 1704 mm (67.09 in.) |
| Ride height (ground clearance) | 187 mm (7.36 in.) |
| Approach angle | 18.5° |
| Departure angle | 25.7° |
| Ramp-over (brakeover) angle | 20.3° |
| Drivetrain Architecture | All wheel drive (4×4). ICE drives rear wheels, front wheels engaged via clutch. |
| Number of gears and type of gearbox | 8 gears, automatic transmission TorqueFlite |
| Front suspension | Coil spring, Rigid axle, Transverse stabilizer |
| Rear suspension | Rigid axle, Leaf spring, Optional Air Suspension |
| Front brakes | Ventilated discs, 359.9×39.1 mm |
| Rear brakes | Ventilated discs, 357.9×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic |
| Tires size | 275/70 R18; 285/60 R20 |
| Wheel rims size | 8J x 18; 8J x 20 |
Powertrain & Engine Architecture
The heart of this RAM 3500 is the Cummins 6.7-liter inline-six diesel engine. This engine, designated as the HO (High Output) variant, benefits from a robust design and a history of reliability. The engine utilizes a cast iron block and head, contributing to its durability. The 2025 model continues to employ a diesel commonrail fuel injection system, delivering precise fuel metering for optimal combustion and efficiency. The turbocharger and intercooler work in tandem to increase air density, boosting power and torque. The overhead valve (OHV) valvetrain, while a more traditional design, is known for its simplicity and durability. The engine’s 16.2:1 compression ratio is typical for high-output diesel engines. The TorqueFlite 8-speed automatic transmission is a crucial component, designed to handle the engine’s substantial torque output. It features electronically controlled shifts for smooth and efficient operation.
Driving Characteristics
The 430 horsepower and 1458 lb-ft of torque delivered by this powertrain configuration translate into impressive real-world performance. While not designed for outright speed, the RAM 3500 excels at towing and hauling heavy loads. The 8-speed automatic transmission helps keep the engine in its optimal power band, providing strong acceleration even when fully loaded. Compared to lower-output Cummins variants, this HO version offers a noticeable increase in responsiveness and pulling power. The automatic transmission, while convenient, may not offer the same level of control as a manual transmission, particularly in demanding off-road situations. However, the TorqueFlite transmission is well-programmed for both on-road comfort and off-road capability.
Equipment & Trim Levels
The 3500 6.7L Cummins HO 4×4 typically comes standard with a well-equipped interior, including cloth upholstery, air conditioning, a user-friendly infotainment system with a touchscreen display, and basic safety features. Higher trim levels, such as Limited Longhorn or Limited, add premium features like leather upholstery, heated and ventilated seats, a premium sound system, and advanced driver-assistance systems. Optional extras include a sunroof, upgraded wheels, and various appearance packages. The Mega Cab configuration provides exceptionally spacious rear seating, making it ideal for families or crews.
Chassis & Braking
The RAM 3500 features a heavy-duty chassis designed to withstand the stresses of heavy hauling. The front suspension utilizes coil springs and a rigid axle with a transverse stabilizer bar, providing a comfortable ride and good handling. The rear suspension employs leaf springs, although an optional air suspension system is available for a smoother ride and adjustable ride height. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. An Anti-lock Braking System (ABS) is standard. The robust braking system is essential for safely controlling the vehicle when towing heavy loads.
Market Reception & Comparison
The RAM 3500 with the 6.7L Cummins HO engine has consistently received positive reviews for its towing capacity, performance, and overall refinement. Critics praise the comfortable ride quality, spacious interior, and user-friendly technology. Compared to other heavy-duty trucks, such as the Ford Super Duty and Chevrolet Silverado/GMC Sierra, the RAM 3500 often stands out for its ride comfort and interior appointments. Fuel economy, while not a primary concern for heavy-duty truck buyers, is generally competitive with other diesel-powered trucks in its class. Reliability has been generally good, although diesel engines can be more expensive to maintain than gasoline engines.
Legacy
The 6.7-liter Cummins engine has established a strong reputation for durability and longevity. Properly maintained, these engines can easily exceed 200,000 miles. The TorqueFlite 8-speed automatic transmission has also proven to be a reliable unit. On the used car market, RAM 3500 models equipped with this powertrain configuration hold their value well, due to their proven capabilities and strong demand. The 2025 facelifted model is expected to continue this trend, offering a compelling combination of power, refinement, and capability for buyers seeking a heavy-duty pickup truck.
