The RAM 2500/3500 Mega Cab I, specifically the facelifted version produced from 2014 to 2018, represented a significant evolution in the heavy-duty pickup truck segment. This generation, internally designated as the DJ platform, offered a compelling blend of capability, comfort, and technology. Within the 2500 and 3500 model lines, the 6.4-liter Hemi V8 engine paired with a six-speed automatic transmission was a popular configuration, positioned as a strong mid-range offering appealing to buyers needing substantial towing and hauling capacity without opting for the more expensive and complex Cummins diesel options. This variant aimed to bridge the gap between work-focused trims and more luxury-oriented models.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Mega Cab I (facelift 2013) |
| Type (Engine) | 2500 6.4 Hemi V8 (410 Hp) Automatic |
| Start of production | 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5-6 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.6 kg/Hp, 132 Hp/tonne |
| Weight-to-torque ratio | 5.3 kg/Nm, 187.4 Nm/tonne |
| Power | 410 Hp @ 5600 rpm |
| Power per litre | 63.9 Hp/l |
| Torque | 582 Nm @ 4000 rpm, 429.26 lb.-ft. @ 4000 rpm |
| Maximum engine speed | 5800 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | ESA |
| Engine displacement | 6417 cm3, 391.59 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 103.9 mm, 4.09 in. |
| Piston Stroke | 94.6 mm, 3.72 in. |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 6.6 l, 6.97 US qt | 5.81 UK qt |
| Coolant | 15.7 l, 16.59 US qt | 13.81 UK qt |
| Kerb Weight | 3106 kg, 6847.56 lbs. |
| Max. weight | 4536 kg, 10000.17 lbs. |
| Max load | 1430 kg, 3152.61 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%) | 5661 kg, 12480.37 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 | 19.1° |
| 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 | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Power steering | Hydraulic Steering |
| Tires size | 275/70 R18 118T; 285/60 R20 115H |
| Wheel rims size | 8J x 18 ET43; 8J x 20 ET55 |
INTRODUCTION
The 2014-2018 RAM 2500/3500 Mega Cab I, featuring the 6.4-liter Hemi V8 and automatic transmission, was a key component of the redesigned heavy-duty lineup introduced by RAM (formerly Dodge). This facelift brought updated styling, improved interior materials, and enhanced technology compared to the previous generation. The Mega Cab configuration, offering significantly more rear-seat space than standard crew cabs, was particularly popular with families and those needing to transport multiple passengers alongside work-related equipment. The 6.4L Hemi served as the gasoline-powered workhorse, slotting between the base 5.7L Hemi and the more expensive, torque-rich 6.7L Cummins turbodiesel.
Powertrain & Engine Architecture
The heart of this variant is the 6.4-liter (6417 cc) Hemi V8 engine, designated as the ESA code. This engine is a naturally aspirated, overhead valve (OHV) design, utilizing a cast iron block and aluminum cylinder heads. It features multi-port fuel injection and a compression ratio of 10:1. The engine produces 410 horsepower at 5600 rpm and 429 lb-ft of torque at 4000 rpm. The Hemi name refers to the hemispherical combustion chambers, a design intended to improve airflow and efficiency. The engine’s valvetrain utilizes two valves per cylinder. Paired with the engine is a six-speed automatic transmission (68RFE), known for its durability and smooth shifting. This transmission is electronically controlled and features a tow/haul mode optimized for heavy loads. The 68RFE transmission was a significant upgrade over previous generations, offering improved responsiveness and efficiency.
Driving Characteristics
The 6.4-liter Hemi in the RAM 2500/3500 provided ample power for everyday driving and demanding tasks. While not as fuel-efficient as the smaller 5.7L Hemi, it offered a noticeable performance increase, particularly when towing or hauling heavy loads. The automatic transmission’s gear ratios were well-suited for both on-road cruising and off-road work. The tow/haul mode adjusted shift points to maintain engine braking on descents and prevent unnecessary shifting while towing. Compared to the Cummins diesel, the 6.4L Hemi was quieter and smoother, but lacked the diesel’s immense low-end torque. The 6.4L felt more responsive than the 5.7L, making it a more enjoyable daily driver for those who didn’t require the ultimate towing capacity.
Equipment & Trim Levels
The 6.4-liter Hemi engine was typically offered on mid-range and higher trim levels, such as the SLT, Laramie, and Limited. Standard features included air conditioning, power windows and locks, a basic infotainment system, and cloth upholstery. Higher trims added features like leather upholstery, heated and ventilated front seats, a premium sound system, navigation, and advanced safety technologies. The Mega Cab configuration, regardless of trim level, offered a spacious rear seat with ample legroom and headroom. Optional extras included a sunroof, upgraded wheels, and various appearance packages.
Chassis & Braking
The RAM 2500/3500 featured a robust chassis designed to handle heavy loads. Both front and rear suspension utilized independent multi-link designs, providing a comfortable ride even when the truck was loaded. The braking system consisted of disc brakes on all four wheels, with ABS (Anti-lock Braking System) as standard. The braking performance was adequate for the truck’s weight, but larger brakes were often recommended for those who frequently tow heavy trailers. Steering was hydraulic, providing a direct and responsive feel.
Market Reception & Comparison
Critics generally praised the 6.4-liter Hemi-equipped RAM 2500/3500 for its strong performance, comfortable ride, and spacious interior. The Mega Cab configuration was particularly well-received for its practicality and passenger comfort. Compared to the 5.7L Hemi, the 6.4L offered a significant power boost, but at the expense of fuel economy. The Cummins diesel remained the preferred choice for those prioritizing maximum towing capacity and fuel efficiency, but the 6.4L Hemi provided a compelling alternative for buyers who didn’t need the diesel’s extreme capabilities. Reliability was generally good, with the 68RFE transmission proving to be particularly durable.
Legacy
The 6.4-liter Hemi V8 and 68RFE automatic transmission combination has proven to be a reliable and durable powertrain. These trucks continue to be popular on the used car market, offering a good balance of capability, comfort, and value. While fuel economy is not a strong point, the 6.4L Hemi provides ample power for a wide range of tasks. Regular maintenance, including oil changes and transmission fluid flushes, is crucial for ensuring the long-term reliability of this powertrain. The 2014-2018 RAM 2500/3500 Mega Cab I, with its 6.4L Hemi, remains a capable and versatile heavy-duty pickup truck that continues to serve owners well today.
