The RAM 2500/3500 Crew Cab Long 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 aimed to provide a balance of substantial towing capacity, robust performance, and a comfortable cabin experience. It falls within the fourth generation (2010-2018) of the RAM heavy-duty lineup, known for its refined interior and improved ride quality compared to its predecessors. This particular variant, with its dual rear wheel (DRW) configuration, was geared towards customers requiring maximum payload and towing capabilities.
Technical Specifications
| Brand | RAM |
| Model | 2500/3500 |
| Generation | 2500/3500 Crew Cab Long 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 | 5-6 |
| Doors | 4 |
| Fuel Type | Diesel |
| Weight-to-power ratio | 9 kg/Hp, 110.9 Hp/tonne |
| Weight-to-torque ratio | 3.6 kg/Nm, 279.1 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 | 3157 kg (6959.99 lbs.) |
| Max. weight | 4581 kg (10099.38 lbs.) |
| Max load | 1424 kg (3139.38 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%) | 6123 kg (13498.9 lbs.) |
| Length | 6589 mm (259.41 in.) |
| Width including mirrors | 2009 mm (79.09 in.) |
| Height | 1867 mm (73.5 in.) |
| Wheelbase | 4303 mm (169.41 in.) |
| Front track | 1742 mm (68.58 in.) |
| Rear (Back) track | 1732 mm (68.19 in.) |
| Minimum turning circle (turning diameter) | 16.2 m (53.15 ft.) |
| Approach angle | 12.5° |
| Departure angle | 22.7° |
| Ramp-over (brakeover) angle | 14.1° |
| Drivetrain Architecture | 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 Crew Cab Long I with the 6.7 HO Cummins diesel engine and dual rear wheels (DRW) was positioned as a premium offering within the RAM heavy-duty truck lineup. It catered to owners needing significant towing and hauling capacity, such as those involved in agriculture, construction, or frequently towing large trailers. The Crew Cab configuration provided ample passenger space, making it suitable for both work and family use. This model year marked a refinement of the previous generation, focusing on interior comfort and improved ride quality while maintaining the rugged durability expected of a heavy-duty truck.
Powertrain & Engine Architecture
At the heart of this RAM 3500 lies the Cummins 6.7-liter inline-six diesel engine, designated the HO (High Output) variant. This engine, identified by the ETJ code, is a robust and well-regarded powerplant known for its longevity and torque production. It utilizes a diesel commonrail fuel injection system, delivering highly pressurized fuel directly into the cylinders for efficient combustion. The engine features an overhead valve (OHV) valvetrain, a design choice favored for its simplicity and durability. A turbocharger and intercooler work in tandem to increase air intake, boosting power and efficiency. The 6.7 HO Cummins produces 350 horsepower at 3000 rpm and a substantial 881 lb-ft of torque at 1500 rpm. The engine’s high compression ratio of 17.3:1 contributes to its efficiency and power output. This particular model came standard with a 6-speed manual transmission, optimized for heavy-duty applications and providing precise control over the engine’s powerband.
Driving Characteristics
The 6.7 HO Cummins-powered RAM 3500 DRW delivers a driving experience focused on capability rather than outright speed. The manual transmission, while requiring more driver involvement than an automatic, provides excellent control and allows the driver to fully utilize the engine’s substantial torque. Acceleration is brisk, especially when considering the truck’s considerable weight. The DRW configuration enhances stability when towing heavy loads, minimizing sway and providing a more confident feel. The leaf spring rear suspension, while contributing to load-carrying capacity, results in a firmer ride when unladen compared to lighter-duty trucks. The engine’s peak torque is readily available at low RPMs, making it ideal for towing and hauling. The 6-speed manual transmission’s gear ratios are carefully selected to maximize efficiency and provide ample power across a wide range of speeds.
Equipment & Trim Levels
The RAM 3500 Crew Cab Long I 3500 6.7 HO Cummins TD (350 Hp) DRW typically came well-equipped, even in its base trim. Standard features included air conditioning, power windows and locks, a basic audio system, and vinyl upholstery. Higher trim levels, such as Laramie or Limited, added features like leather upholstery, heated and ventilated seats, a premium audio system, navigation, and advanced safety features. Optional extras included a sunroof, upgraded wheels, and various towing packages. The Crew Cab configuration provided generous space for five to six passengers, with comfortable seating and ample legroom. The interior design focused on functionality and durability, with easy-to-clean surfaces and robust materials.
Chassis & Braking
The RAM 3500’s chassis is built for heavy-duty use, featuring a robust frame and heavy-duty suspension components. The front suspension utilizes a double wishbone design, providing a comfortable ride and good handling. The rear suspension employs leaf springs, optimized for load-carrying capacity. The DRW configuration significantly increases stability and load-carrying capacity. Braking duties are handled by disc brakes on all four wheels, providing ample stopping power even when heavily loaded. An Anti-lock Braking System (ABS) is standard, enhancing safety and control during emergency braking situations. Tire sizes varied depending on the trim level and options selected, ranging from 245/70 R17 to 275/70 R18.
Market Reception & Comparison
The 2012 RAM 3500 with the 6.7 HO Cummins engine received generally positive reviews from automotive critics. It was praised for its powerful engine, comfortable ride (for a heavy-duty truck), and spacious interior. Compared to its competitors, the Ford Super Duty and Chevrolet/GMC HD trucks, the RAM 3500 was often noted for its refined interior and comfortable ride quality. Fuel economy, while not a primary concern for heavy-duty truck buyers, was comparable to other diesel-powered trucks in its class. Reliability was generally good, with the Cummins engine being particularly well-regarded for its durability. The manual transmission, while preferred by some, was seen as less convenient than the automatic transmissions offered by competitors.
Legacy
The 6.7 HO Cummins engine has proven to be exceptionally reliable, and well-maintained examples of the 2012 RAM 3500 continue to be highly sought after in the used truck market. The engine’s longevity and relatively simple design contribute to its enduring popularity. These trucks often command a premium price compared to similar models with less capable engines. The DRW configuration further enhances their value, as it caters to a specific niche of buyers requiring maximum towing and hauling capacity. The 2012 RAM 3500 represents a sweet spot in the heavy-duty truck market, offering a blend of power, comfort, and durability that continues to appeal to truck enthusiasts and professionals alike.

