The RAM 2500/3500 Mega Cab I, specifically the 3500 model equipped with the 6.7 HO Cummins turbocharged diesel engine producing 350 horsepower and paired with a six-speed automatic transmission and four-wheel drive (4×4), represents a significant offering in the heavy-duty pickup truck segment. Introduced for the 2012 model year, this configuration aimed to provide a balance of substantial towing capacity, robust performance, and a degree of everyday usability within the RAM heavy-duty lineup. This variant, often referred to as a “DRW” (Dual Rear Wheel) model, was positioned as a workhorse for those needing maximum payload and towing capabilities.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I |
| Type (Engine) | 3500 6.7 HO Cummins TD (350 Hp) 4×4 Automatic DRW |
| Start of production | 2012 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5-6 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 9.7 kg/Hp, 102.6 Hp/tonne |
| Weight-to-torque ratio | 3.1 kg/Nm, 317.8 Nm/tonne |
| Power | 350 Hp @ 3000 rpm |
| Power per litre | 52.3 Hp/l |
| Torque | 1084 Nm @ 1500 rpm (799.52 lb.-ft. @ 1500 rpm) |
| Maximum engine speed | 3500 rpm |
| Engine Model/Code | ETJ |
| 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 | 17.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | OHV |
| Engine oil capacity | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Coolant capacity | 21.4 l (22.61 US qt | 18.83 UK qt) |
| Kerb Weight | 3411 kg (7519.97 lbs.) |
| Max. weight | 4763 kg (10500.62 lbs.) |
| Max load | 1352 kg (2980.65 lbs.) |
| Trunk (boot) space – maximum | 1628 l (57.49 cu. ft.) |
| Fuel tank capacity | 129 l (34.08 US gal | 28.38 UK gal) |
| Permitted trailer load with brakes (12%) | 6055 kg (13348.99 lbs.) |
| Length | 6309 mm (248.39 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 1989 mm (78.31 in.) |
| Wheelbase | 4064 mm (160 in.) |
| Front track | 1735 mm (68.31 in.) |
| Rear (Back) track | 1732 mm (68.19 in.) |
| Minimum turning circle | 14.2 m (46.59 ft.) |
| Approach angle | 23.4° |
| Departure angle | 27.6° |
| Ramp-over angle | 18.3° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Leaf spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/70 R17; 265/70 R17; 275/70 R18 |
| Wheel rims size | 7.5J x 17; 8J x 17; 8J x 18 |
Powertrain & Engine Architecture
The heart of this RAM 3500 is the 6.7-liter Cummins HO (High Output) inline-six cylinder diesel engine, designated with the ETJ code. This engine represents a significant evolution of Cummins’ long-standing reputation for durability and torque. The 6.7L Cummins utilizes a diesel commonrail fuel injection system, delivering highly pressurized fuel directly into the cylinders for optimized combustion. The engine is equipped with a variable geometry turbocharger (VGT) and an intercooler, enhancing both power and efficiency. The OHV (Overhead Valve) valvetrain design, while traditional, contributes to the engine’s robustness and low-end torque characteristics. The six-speed automatic transmission, sourced from Allison, was specifically calibrated to handle the substantial torque output of the Cummins engine. This transmission features electronically controlled shifting and a tow/haul mode for improved performance when towing heavy loads.
Driving Characteristics
The 350-horsepower and 1084 lb-ft of torque delivered by this powertrain configuration translates to impressive real-world performance. While not as quick accelerating as lighter-duty trucks or those equipped with the higher-output Cummins variant, the 350 hp engine provides ample power for hauling and towing. The automatic transmission, while smooth, prioritizes durability and functionality over sporty responsiveness. Gear ratios are optimized for towing, meaning lower gears are readily available for climbing hills or maintaining speed under load. Compared to manual transmission versions, the automatic offers ease of use, particularly in stop-and-go traffic or for drivers less experienced with manual transmissions. However, it does sacrifice some driver control and potentially a slight amount of fuel efficiency.
Equipment & Trim Levels
The 2012 RAM 3500 Mega Cab I 6.7 HO Cummins DRW typically came standard with features expected of a heavy-duty truck, including air conditioning, power windows and locks, and a basic audio system. The Mega Cab configuration offered significantly more interior space than standard cab models, accommodating up to six passengers comfortably. Upholstery was typically vinyl or cloth, with optional leather upgrades available. Common optional extras included a navigation system, premium sound system, heated seats, and various towing packages. The DRW configuration itself was a significant feature, providing increased stability and payload capacity for demanding applications.
Chassis & Braking
The chassis of the RAM 3500 is built around a robust fully boxed frame designed to withstand the stresses of heavy hauling. The front suspension utilizes an independent multi-link setup for improved ride quality and handling, while the rear suspension employs a traditional leaf spring design, optimized for load-carrying capacity. Braking duties are handled by disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. Due to the high weight of the vehicle, particularly in DRW configuration, braking performance is adequate but not exceptional. The tires, typically 245/70R17, 265/70R17, or 275/70R18, are chosen for their load-carrying capacity and durability.
Market Reception & Comparison
The 2012 RAM 3500 with the 6.7 HO Cummins and automatic transmission received generally positive reviews. Critics praised its powerful engine, comfortable ride (for a heavy-duty truck), and spacious interior. However, some noted the relatively high price compared to competitors like Ford and Chevrolet. Fuel economy, while typical for a heavy-duty diesel, was not a strong point. Compared to the higher-output Cummins variant, the 350 hp engine offered a more affordable entry point into the heavy-duty truck market, appealing to buyers who prioritized value and durability over outright power. Compared to the 5.7L Hemi V8 offered in the RAM 2500, the Cummins diesel provided significantly more torque and towing capacity, albeit at a higher initial cost.
Legacy
The 6.7L Cummins engine, in all its iterations, has proven to be exceptionally reliable. Properly maintained, these engines can easily exceed 200,000 or even 300,000 miles. The Allison automatic transmission is also known for its durability. As a result, the 2012 RAM 3500 6.7 HO Cummins DRW holds its value well in the used car market. These trucks remain popular among those needing a capable and dependable workhorse. Common maintenance items include regular oil changes, fuel filter replacements, and occasional repairs to the exhaust gas recirculation (EGR) system. Overall, this variant represents a well-engineered and durable heavy-duty pickup truck that continues to serve owners reliably for years to come.
