The RAM 2500/3500 Regular Cab I, specifically the 3500 model equipped with the 6.7 HO Cummins turbocharged diesel engine producing 350 horsepower, represents a significant offering in the heavy-duty pickup truck segment. Introduced for the 2012 model year, this configuration catered to buyers needing substantial towing and hauling capabilities. It falls within the fourth generation of the RAM heavy-duty line (2010-2018), known for its refined interior and robust chassis. This particular variant, designated as a Dual Rear Wheel (DRW) model, further enhances its load-carrying capacity, making it a popular choice for commercial applications and those requiring maximum capability.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Regular Cab I |
| Type (Engine) | 3500 6.7 HO Cummins TD (350 Hp) DRW |
| Start of production | 2012 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 2-3 |
| Doors | 2 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 8.9 kg/Hp, 112.5 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 283.1 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) |
| 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 | 21.4 l (22.61 US qt | 18.83 UK qt) |
| Kerb Weight | 3112 kg (6860.79 lbs.) |
| Max. weight | 5216 kg (11499.31 lbs.) |
| Max load | 2104 kg (4638.53 lbs.) |
| Trunk (boot) space – maximum | 2115 l (74.69 cu. ft.) |
| Fuel tank capacity | 132 l (34.87 US gal | 29.04 UK gal) |
| Permitted trailer load with brakes (12%) | 6350 kg (13999.35 lbs.) |
| Length | 5867 mm (230.98 in.) |
| Width including mirrors | 2004 mm (78.9 in.) |
| Height | 1869 mm (73.58 in.) |
| Wheelbase | 3569 mm (140.51 in.) |
| Front track | 1742 mm (68.58 in.) |
| Rear (Back) track | 1925 mm (75.79 in.) |
| Minimum turning circle (turning diameter) | 13.7 m (44.95 ft.) |
| Approach angle | 17.2° |
| Departure angle | 23.1° |
| Ramp-over (brakeover) angle | 23.1° |
| 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, manual 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 |
INTRODUCTION
The 2012 RAM 3500 Regular Cab I with the 6.7 HO Cummins diesel engine and Dual Rear Wheel configuration was positioned as a workhorse within the RAM lineup. It served as a heavy-duty solution for customers prioritizing maximum towing and payload capacity over comfort and convenience features found in higher trim levels. This model year marked a continuation of the refined fourth-generation RAM trucks, building upon the foundation laid in 2010. The “HO” designation signifies a higher output version of the 6.7L Cummins, offering increased horsepower and torque compared to the standard engine option. The DRW setup, with its wider stance and increased stability, made it ideal for demanding tasks like hauling large trailers or heavy equipment.
Powertrain & Engine Architecture
At the heart of this RAM 3500 lies the Cummins 6.7-liter inline-six diesel engine, specifically the ETJ variant. This engine is renowned for its durability and longevity. The “HO” (High Output) version utilizes a variable geometry turbocharger (VGT) and a higher flow rate fuel injection system to deliver 350 horsepower at 3000 rpm and a substantial 881 lb-ft of torque at 1500 rpm. The engine employs a diesel commonrail fuel injection system, ensuring precise fuel delivery for optimal combustion and efficiency. The overhead valve (OHV) valvetrain, while a more traditional design, contributes to the engine’s robustness and ease of maintenance. The engine’s 17.3:1 compression ratio is typical for high-output diesel engines, maximizing thermal efficiency. The 6-speed manual transmission was the standard offering for this configuration, providing drivers with full control over gear selection and power delivery.
Driving Characteristics
The 2012 RAM 3500 DRW with the 6.7 HO Cummins and manual transmission delivers a driving experience focused on capability rather than agility. The substantial torque output allows for effortless towing and hauling, even with heavy loads. The manual transmission, while requiring more driver involvement, provides precise control and allows for optimal engine braking when descending steep grades. Compared to the standard output Cummins engine, the HO version offers noticeably quicker acceleration and improved responsiveness. However, the DRW configuration and heavy-duty suspension contribute to a firmer ride quality, especially when unladen. The gear ratios in the 6-speed manual are well-suited for both highway cruising and low-speed towing, providing ample power across a wide range of conditions.
Equipment & Trim Levels
The Regular Cab configuration of the RAM 3500 was typically offered in base trims, focusing on functionality and affordability. Standard equipment generally included air conditioning, a basic audio system, and vinyl upholstery. The interior was designed with durability in mind, featuring easy-to-clean surfaces and a straightforward layout. Optional extras included power windows and locks, upgraded audio systems, and various towing packages. The DRW models often came standard with heavier-duty suspension components and larger brakes to handle the increased load capacity. While not as luxurious as higher trim levels like the Laramie or Longhorn, the Regular Cab provided a practical and comfortable work environment for drivers spending long hours behind the wheel.
Chassis & Braking
The chassis of the 2012 RAM 3500 is built around a robust fully boxed frame, designed to withstand the stresses of heavy-duty use. The front suspension utilizes a double wishbone setup, providing a comfortable ride and stable handling. The rear suspension employs a traditional leaf spring design, optimized for load-carrying capacity. The DRW configuration features a wider track width, enhancing stability and reducing body roll. Braking duties are handled by disc brakes on all four wheels, providing ample stopping power even with heavy loads. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations.
Market Reception & Comparison
The 2012 RAM 3500 DRW with the 6.7 HO Cummins engine received positive reviews for its exceptional towing and hauling capabilities. Critics praised the engine’s power and torque, as well as the truck’s robust construction. Compared to other heavy-duty trucks in its class, such as the Ford F-350 and Chevrolet Silverado 3500, the RAM 3500 offered a competitive combination of performance, features, and value. Fuel economy, while not a primary concern for buyers in this segment, was generally comparable to other diesel-powered heavy-duty trucks. The manual transmission was appreciated by those who preferred greater control, but some drivers found it less convenient than the available automatic transmission.
Legacy
The 6.7 HO Cummins engine has proven to be exceptionally reliable, with many examples exceeding 300,000 miles with proper maintenance. The 2012 RAM 3500 DRW remains a popular choice in the used truck market, particularly among those seeking a capable and durable work truck. Its robust construction and powerful engine ensure that it can continue to perform demanding tasks for years to come. The DRW configuration, while less common than single rear wheel models, commands a premium due to its increased towing and hauling capacity. Regular maintenance, including oil changes and filter replacements, is crucial for ensuring the longevity of this powertrain.
