The RAM 2500/3500 Mega Cab I, specifically the 2500 model equipped with the 6.7-liter Cummins turbodiesel engine producing 350 horsepower and paired with a six-speed manual transmission and a 4×4 drivetrain, represents a significant offering in the heavy-duty pickup truck segment. Produced from 2010 to 2012, this variant occupied a crucial position within the broader RAM HD lineup, catering to buyers needing substantial towing and hauling capabilities combined with the spaciousness of the Mega Cab body style. It was part of the third generation of the RAM HD series, known for its robust construction and focus on work-oriented performance.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I |
| Type (Engine) | 2500 6.7 Cummins TD (350 Hp) 4×4 |
| 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 | 9.9 kg/Hp, 100.9 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 238.3 Nm/tonne |
| Power | 350 Hp @ 3013 rpm |
| Power per litre | 52.3 Hp/l |
| Torque | 827 Nm @ 1400 rpm (609.96 lb.-ft. @ 1400 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 | 3470 kg (7650.04 lbs.) |
| Max. weight | 4354 kg (9598.93 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%) | 5534 kg (12200.38 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 (turning diameter) | 14.2 m (46.59 ft.) |
| Approach angle | 23.4° |
| Departure angle | 27.6° |
| Ramp-over (brakeover) angle | 18.3° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, manual 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 |
INTRODUCTION
The 2010-2012 RAM 2500/3500 Mega Cab I with the 6.7L Cummins diesel and six-speed manual transmission was a workhorse designed for demanding tasks. The Mega Cab configuration offered significantly increased rear-seat space compared to standard crew cab models, making it popular with those needing to transport passengers alongside work equipment. This particular variant aimed to provide a balance between capability, fuel efficiency (for a heavy-duty truck), and a relatively engaging driving experience thanks to the manual transmission. It was positioned as a step up from the gasoline-powered engines offered in the 2500/3500 range, targeting customers who regularly towed heavy loads or required the durability and longevity of a diesel engine.
Powertrain & Engine Architecture
The heart of this RAM 2500 is the 6.7-liter Cummins inline-six turbodiesel engine, designated as the ETJ code. This engine represented a significant advancement in Cummins technology, featuring a common-rail fuel injection system capable of delivering extremely precise fuel metering for optimized combustion. The turbocharger, coupled with an intercooler, boosted power output and improved efficiency. The engine’s robust construction, with a cast iron block and head, was designed for high durability and long service life. The six-speed manual transmission provided drivers with full control over gear selection, allowing for optimal power delivery in various driving conditions. The transmission’s gear ratios were carefully chosen to maximize towing capacity and fuel economy.
Driving Characteristics
The 6.7L Cummins in this configuration delivered a substantial 350 horsepower and a massive 827 lb-ft of torque. This translated into impressive towing and hauling capabilities. While not as quick accelerating as lighter trucks, the 2500/3500 provided strong, consistent power across a wide RPM range. The manual transmission allowed drivers to maintain optimal engine speed for towing or climbing hills. Compared to the automatic transmission options available, the manual offered a more direct connection to the engine and a more engaging driving experience. However, it also required more driver involvement, particularly in stop-and-go traffic. The heavy-duty suspension, while providing a stable ride when loaded, could feel firm when the truck was empty.
Equipment & Trim Levels
The RAM 2500/3500 Mega Cab I offered a range of trim levels, with the 6.7L Cummins engine typically found in higher trims like SLT, Laramie, and Limited. Standard features included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Higher trims added features such as leather upholstery, heated seats, a premium audio system, navigation, and a rear-seat entertainment system. Optional extras included a sunroof, upgraded wheels, and various towing packages. The Mega Cab configuration itself was a significant feature, providing class-leading rear-seat legroom and comfort.
Chassis & Braking
The RAM 2500/3500 utilized a robust body-on-frame construction, designed to withstand heavy loads and demanding use. The front suspension featured an independent multi-link design, providing a relatively comfortable ride. The rear suspension employed a traditional leaf spring setup, optimized for load-carrying capacity. Braking duties were handled by disc brakes on all four wheels, providing ample stopping power even when heavily loaded. An Anti-lock Braking System (ABS) was standard, enhancing safety and control. The heavy-duty chassis and braking system were crucial for managing the truck’s substantial weight and towing capacity.
Market Reception & Comparison
The RAM 2500/3500 with the 6.7L Cummins diesel received generally positive reviews from automotive critics. The engine was praised for its power, torque, and durability. The Mega Cab configuration was lauded for its spacious interior. However, some critics noted the truck’s relatively high price and firm ride quality. Compared to the gasoline-powered RAM 2500/3500 models, the Cummins diesel offered significantly improved towing capacity and fuel economy when hauling heavy loads. Compared to competitors like the Ford Super Duty and Chevrolet Silverado HD, the RAM offered a unique combination of features and capabilities, particularly in the Mega Cab configuration. The manual transmission option was a niche offering, appealing to drivers who preferred a more engaging driving experience.
Legacy
The 6.7L Cummins engine has proven to be exceptionally reliable and durable, with many examples exceeding 300,000 miles with proper maintenance. The 2010-2012 RAM 2500/3500 Mega Cab I with this powertrain remains a popular choice in the used truck market, particularly among those seeking a capable and long-lasting work truck. While newer RAM HD models offer more advanced technology and features, this generation represents a sweet spot for many buyers, offering a proven powertrain and a spacious interior at a relatively affordable price. The combination of the Cummins diesel, manual transmission, and Mega Cab body style has created a loyal following among truck enthusiasts.
