The RAM 2500/3500 Mega Cab I, specifically the facelifted version produced from 2013 to 2018, represented a significant evolution in the heavy-duty pickup truck segment. This generation, internally designated as the fourth generation of the RAM heavy-duty line, built upon the foundation laid by its predecessors, offering increased capability, refinement, and a wider range of configurations. The 3500 model, equipped with the 6.7-liter High Output (HO) Cummins turbocharged diesel engine paired with a six-speed automatic transmission and a four-wheel-drive system, stood as a flagship offering, targeted towards buyers needing substantial towing and hauling capacity. This particular configuration occupied the upper echelon of the RAM heavy-duty lineup, positioned above the base engine options and aimed at professional tradesmen, ranchers, and those with demanding workloads.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I (facelift 2013) |
| Type (Engine) | 3500 6.7 HO Cummins TD (385 Hp) 4×4 Automatic |
| Start of production | 2013 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5-6 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 9.6 kg/Hp, 104.7 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 313.3 Nm/tonne |
| Power | 385 Hp @ 2800 rpm |
| Power per litre | 57.5 Hp/l |
| Torque | 1152 Nm @ 1700 rpm (849.67 lb.-ft. @ 1700 rpm) |
| Maximum engine speed | 3200 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | ETK |
| 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 | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Coolant | 21.4 l (22.61 US qt | 18.83 UK qt) |
| Kerb Weight | 3677 kg (8106.4 lbs.) |
| Max. weight | 5625 kg (12401 lbs.) |
| Max load | 1948 kg (4294.6 lbs.) |
| Trunk (boot) space – maximum | 1628 l (57.49 cu. ft.) |
| Fuel tank capacity | 117 l (30.91 US gal | 25.74 UK gal) |
| Permitted trailer load with brakes (12%) | 7584 kg (16719.86 lbs.) |
| Length | 6309 mm (248.39 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 2024 mm (79.69 in.) |
| Wheelbase | 4074 mm (160.39 in.) |
| Front track | 1720 mm (67.72 in.) |
| Rear (Back) track | 1704 mm (67.09 in.) |
| Minimum turning circle (turning diameter) | 14.2 m (46.59 ft.) |
| Approach angle | 25.1° |
| Departure angle | 25.5° |
| Ramp-over (brakeover) angle | 20.1° |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission Aisin |
| 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 | 275/70 R18 118T; 285/60 R20 115T |
| Wheel rims size | 8J x 18 ET43; 8J x 20 ET55 |
INTRODUCTION
The 2013-2018 RAM 2500/3500 Mega Cab I facelift represented a substantial refresh of the previous generation, focusing on interior refinement, enhanced technology, and continued improvements to its already formidable capability. The 3500 model, particularly when equipped with the 6.7-liter Cummins HO diesel, was designed to be a workhorse. The “Mega Cab” configuration offered an exceptionally spacious rear seat, making it popular with families and crews who frequently travel together. This variant was a key player in the North American heavy-duty truck market, competing directly with offerings from Ford (Super Duty) and General Motors (Silverado/Sierra HD).
Powertrain & Engine Architecture
The heart of this variant is the Cummins 6.7-liter inline-six diesel engine, specifically the High Output (HO) version. The engine code, ETK, designates this particular iteration. This engine utilizes a robust cast iron block and head, known for its durability and longevity. The HO version featured a variable geometry turbocharger (VGT) and an intercooler, boosting power output to 385 horsepower at 2800 rpm and a massive 1152 lb-ft of torque at 1700 rpm. Fuel is delivered via a high-pressure common rail diesel injection system, ensuring precise fuel metering and efficient combustion. The engine employs an overhead valve (OHV) valvetrain, a design choice favored for its simplicity and reliability. The six-speed Aisin automatic transmission, known for its durability and smooth shifting, was specifically chosen to handle the engine’s substantial torque output. This transmission featured electronically controlled shifting and tow/haul mode for optimized performance when towing heavy loads.
Driving Characteristics
The 6.7L HO Cummins with the Aisin automatic delivers a driving experience focused on effortless power and capability. While not as quick off the line as some gasoline-powered trucks, the immense torque available from low RPMs allows for confident acceleration even when heavily loaded. The Aisin transmission’s gear ratios are well-matched to the engine’s powerband, providing smooth and predictable shifts. Compared to the standard output Cummins or the gasoline engine options, this variant offers significantly more pulling power. The automatic transmission, while convenient, does result in a slight reduction in fuel economy compared to a manual transmission equipped model. However, the convenience and ease of use are often prioritized by buyers in this segment. The substantial weight of the 3500 Mega Cab is noticeable, but the robust suspension and powerful brakes provide a stable and controlled driving experience.
Equipment & Trim Levels
The 3500 Mega Cab with the Cummins HO engine was typically offered in higher trim levels, such as Laramie, Longhorn, and Limited. Standard features included air conditioning, power windows and locks, a premium audio system, and a rearview camera. Higher trims added features like leather upholstery, heated and ventilated front seats, a navigation system, and advanced safety technologies. Optional extras included a sunroof, upgraded audio systems, and various appearance packages. The Mega Cab configuration itself was a significant feature, providing class-leading rear seat space. Interior materials and finishes were generally of high quality, reflecting the truck’s premium positioning.
Chassis & Braking
The RAM 3500 utilizes a heavy-duty chassis designed to withstand the stresses of demanding workloads. The front suspension features an independent multi-link design, providing a comfortable ride and good handling. The rear suspension employs a traditional leaf spring setup, optimized for load-carrying capacity. Brakes are heavy-duty discs on all four wheels, providing ample stopping power even when towing. An Anti-lock Braking System (ABS) is standard. The 4×4 system provides excellent traction in a variety of conditions. The robust frame and suspension components contribute to the truck’s high towing and payload capacities.
Market Reception & Comparison
The RAM 3500 with the 6.7L Cummins HO engine and Aisin automatic received generally positive reviews from automotive critics. It was praised for its powerful engine, smooth transmission, comfortable ride, and spacious interior. Compared to the standard output Cummins, the HO version offered a significant increase in towing and hauling capacity. Compared to gasoline-powered trucks, the Cummins diesel provided superior fuel economy and durability. However, the diesel engine also carried a higher price tag. Reliability was generally good, although some owners reported issues with the turbocharger and fuel injection system. Overall, this variant was considered a top contender in the heavy-duty truck segment.
Legacy
The 2013-2018 RAM 3500 with the 6.7L Cummins HO engine has proven to be a durable and reliable workhorse. These trucks continue to hold their value well in the used car market, reflecting their reputation for longevity and capability. The Cummins engine is particularly well-regarded for its durability and potential for long-term service. While maintenance costs can be higher than gasoline-powered trucks, the Cummins engine’s longevity and fuel efficiency often offset these costs. This variant remains a popular choice for those needing a heavy-duty truck capable of handling demanding workloads.
