The RAM 2500/3500 Mega Cab I, specifically the 2500 model equipped with the 6.7-liter Cummins turbocharged diesel engine producing 350 horsepower and paired with an automatic transmission, represents a significant offering in the American heavy-duty pickup truck market. Produced from 2010 to 2012, this configuration occupied a sweet spot in the lineup, balancing substantial towing and hauling capability with a degree of everyday usability. It was part of the second generation of the redesigned Ram Heavy Duty trucks, known internally as the D/W series, and built upon the foundations of the previous generation while introducing substantial improvements in refinement, power, and technology. This variant catered to buyers needing serious truck capability without necessarily opting for the highest-output, most expensive trims.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I |
| Type (Engine) | 2500 6.7 Cummins TD (350 Hp) Automatic |
| Start of production | 2010 |
| 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 | 9.1 kg/Hp, 109.4 Hp/tonne |
| Weight-to-torque ratio | 3.6 kg/Nm, 275.5 Nm/tonne |
| Power | 350 Hp @ 3000 rpm |
| Power per litre | 52.3 Hp/l |
| Torque | 881 Nm @ 1500 rpm (649.79 lb.-ft. @ 1500 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.) |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Coolant | 21.4 l (22.61 US qt | 18.83 UK qt) |
| Kerb Weight | 3198 kg (7050.38 lbs.) |
| Max. weight | 4082 kg (8999.27 lbs.) |
| Max load | 884 kg (1948.89 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%) | 3878 kg (8549.53 lbs.) |
| Length | 6309 mm (248.39 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 1882 mm (74.09 in.) |
| Wheelbase | 4077 mm (160.51 in.) |
| Front track | 1742 mm (68.58 in.) |
| Rear (Back) track | 1732 mm (68.19 in.) |
| Minimum turning circle (turning diameter) | 15.4 m (50.52 ft.) |
| Approach angle | 14.0° |
| Departure angle | 24.2° |
| Ramp-over (brakeover) angle | 15.8° |
| 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 |
| Front suspension | Double wishbone |
| 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 2500 is the 6.7-liter Cummins inline-six diesel engine, designated as the ETJ code. This engine represented a significant leap forward for Cummins, featuring a cast iron block, aluminum cylinder head, and a 24-valve design. The engine utilized a Bosch common rail fuel injection system, delivering highly precise fuel metering for improved efficiency and reduced emissions. A variable geometry turbocharger (VGT) with an intercooler further enhanced performance by providing increased boost across a wider RPM range. The 6690cc displacement, combined with the turbocharging, allowed for a robust 350 horsepower at 3000 rpm and a substantial 881 Nm (649.79 lb-ft) of torque at just 1500 rpm. The automatic transmission was a six-speed unit, designed to handle the engine’s considerable torque output and provide smooth shifting.
Driving Characteristics
The 350 hp/881 Nm combination in the 2500 provided a compelling driving experience. While not as overtly powerful as the higher-output Cummins variants, this configuration offered a more relaxed and refined driving experience, particularly on the highway. The automatic transmission, while not offering the direct control of a manual, was well-matched to the engine’s torque curve, providing ample power for towing and hauling without constant downshifting. The gear ratios were optimized for both work and cruising, allowing for comfortable highway speeds and strong acceleration when needed. Compared to the manual transmission versions, the automatic traded some driver engagement for ease of use, making it a popular choice for those who frequently encountered stop-and-go traffic or preferred a less demanding driving experience.
Equipment & Trim Levels
The 2500/3500 Mega Cab I with the 6.7L Cummins and automatic transmission was typically offered in mid-range trim levels, such as the SLT or Laramie. Standard features generally included air conditioning, power windows and locks, a basic audio system, and cloth upholstery. The Mega Cab configuration provided significantly more rear-seat space than the standard cab models, making it ideal for families or crews. Optional extras included leather upholstery, a premium sound system, navigation, heated seats, and various towing packages. The Laramie trim, in particular, added a significant level of luxury and refinement, with features like chrome exterior accents and upgraded interior materials.
Chassis & Braking
The RAM 2500/3500 utilized a robust chassis designed to withstand the stresses of heavy-duty use. The front suspension featured a double wishbone design, while the rear suspension employed leaf springs. This setup provided a comfortable ride, even when the truck was heavily loaded. Braking duties were handled by disc brakes on all four wheels, coupled with an Anti-lock Braking System (ABS) for enhanced safety. The rear axle ratios varied depending on the specific configuration and intended use, with options available for both fuel economy and towing performance.
Market Reception & Comparison
The 2500/3500 Mega Cab I with the 6.7L Cummins and automatic transmission was generally well-received by critics and consumers alike. It was praised for its powerful engine, comfortable ride, and spacious interior. Compared to the higher-output Cummins variants, this configuration offered a better balance of performance and fuel economy. While the 350 hp version didn’t deliver the same raw power as the 400 hp or 420 hp options, it provided ample capability for most users and was often more affordable. Against competitors like the Ford Super Duty and Chevrolet Silverado HD, the RAM 2500/3500 stood out for its refined interior and comfortable ride quality.
Legacy
The 6.7-liter Cummins engine, in all its iterations, has proven to be remarkably durable and reliable. The 2010-2012 models, including the 350 hp automatic variant, are generally considered to be well-built and capable trucks. On the used car market, these trucks continue to command respectable prices, reflecting their reputation for longevity and capability. Properly maintained examples can easily exceed 200,000 miles, and many are still actively used for work and recreation. The combination of a powerful diesel engine, a spacious interior, and a comfortable ride has cemented the RAM 2500/3500 Mega Cab I as a popular choice among truck enthusiasts and those needing a capable and reliable heavy-duty pickup.
