2012 RAM 25003500 Crew Cab Long I 3500 6.7 HO Cummins TD (350 Hp) Automatic

The RAM 2500/3500 Crew Cab Long I, specifically the 3500 model equipped with the 6.7 HO Cummins turbocharged diesel engine and automatic transmission, 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 degree of everyday usability. 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 variant occupied a sweet spot in the lineup, offering more power and capability than the base engine options, but without the extreme cost associated with the highest-output Cummins configurations.

Technical Specifications

INTRODUCTION

The 2012 RAM 2500/3500 Crew Cab Long I, powered by the 6.7-liter HO Cummins diesel and paired with an automatic transmission, was a workhorse designed for demanding tasks. Positioned within the RAM heavy-duty lineup, it catered to owners needing substantial towing and hauling capabilities without necessarily requiring the maximum output offered by the higher-trim Cummins engines. The “HO” designation (High Output) indicated a step up in power compared to the standard Cummins offering, making it a popular choice for those frequently towing large trailers, such as fifth-wheels, boats, or construction equipment. 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 fourth-generation RAM HD trucks, building upon the foundation laid in 2010 with improvements to interior materials and overall refinement.

Powertrain & Engine Architecture

At the heart of this variant lies the Cummins 6.7-liter inline-six diesel engine, specifically the ETJ code. This engine is renowned for its durability and longevity. The “HO” version featured a variable geometry turbocharger (VGT) and an upgraded fuel injection system, boosting output to 350 horsepower at 3000 rpm and a massive 1084 lb-ft of torque at 1500 rpm. The engine utilizes a common-rail direct injection system, delivering highly pressurized fuel directly into the cylinders for efficient combustion. The overhead valve (OHV) valvetrain, while a more traditional design, contributes to the engine’s robustness and ease of maintenance. The automatic transmission used was typically a 6-speed unit, designed to handle the substantial torque output of the Cummins engine. This transmission featured electronically controlled shifting and tow/haul mode for optimized performance when towing.

Driving Characteristics

The 6.7 HO Cummins with the automatic transmission delivered a driving experience characterized by immense low-end torque. Acceleration, while not sporty, was more than adequate for moving a heavy truck and substantial loads. The automatic transmission shifted smoothly, and the tow/haul mode intelligently held gears longer to maintain engine braking and prevent “hunting” when ascending or descending hills while towing. Compared to the standard Cummins engine, the HO version offered noticeably more power, particularly when fully loaded. Compared to manual transmission equipped trucks, the automatic provided ease of use, especially in stop-and-go traffic, but some drivers preferred the greater control offered by a manual gearbox. The substantial weight of the truck and the inherent characteristics of a diesel engine meant that fuel economy, while reasonable for a heavy-duty truck, wasn’t a primary strength.

Equipment & Trim Levels

The RAM 2500/3500 Crew Cab Long I 3500 6.7 HO Cummins TD Automatic was typically available in several trim levels, including ST, SLT, and Laramie. The base ST trim offered essential features like air conditioning, power windows and locks, and a basic audio system. The SLT trim added features such as upgraded cloth upholstery, alloy wheels, and a more advanced audio system. The Laramie trim represented the premium offering, with leather upholstery, heated and ventilated front seats, a premium audio system, and additional chrome exterior trim. Optional extras included a navigation system, rear-seat entertainment system, and various towing packages. Standard safety features included ABS brakes and multiple airbags.

Chassis & Braking

The chassis of the RAM 2500/3500 was built around a robust fully boxed frame, designed to withstand the stresses of heavy hauling and towing. The front suspension utilized a double wishbone design, while the rear suspension employed leaf springs. This configuration provided a comfortable ride, even when the truck was unloaded, and excellent stability when towing. Braking duties were handled by disc brakes on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) helped maintain steering control during emergency braking situations. Stabilizer bars were included to reduce body roll during cornering.

Market Reception & Comparison

The 2012 RAM 2500/3500 with the 6.7 HO Cummins and automatic transmission was generally well-received by critics and consumers alike. It was praised for its powerful engine, comfortable ride, and spacious interior. Compared to competing trucks from Ford and General Motors, the RAM offered a unique combination of refinement and capability. Fuel economy was comparable to other heavy-duty trucks in its class, but the Cummins engine’s longevity and relatively low maintenance costs were significant advantages. The automatic transmission was considered a good match for the engine, providing smooth and effortless operation. However, some reviewers noted that the truck’s large size could make it challenging to maneuver in tight spaces.

Legacy

The 6.7 HO Cummins engine has proven to be exceptionally reliable, with many examples exceeding 200,000 miles with proper maintenance. These trucks continue to hold their value well in the used car market, particularly those that have been well-maintained and haven’t been subjected to excessive abuse. The combination of power, durability, and capability makes the 2012 RAM 2500/3500 Crew Cab Long I 3500 6.7 HO Cummins TD Automatic a desirable choice for buyers seeking a robust and dependable heavy-duty pickup truck. Common maintenance items include regular oil changes, fuel filter replacements, and occasional attention to the cooling system. The Cummins engine’s reputation for longevity ensures that these trucks remain a viable option for years to come.