AVAILABLE HIGH-OUTPUT 6.7L CUMMINS® TURBO DIESEL I6 ENGINE
Designed for commercial use, the 6.7L Cummins® Turbo Diesel I6 engine is a highly reliable powerplant for heavy workloads. The engine block design enhances cooling and pressure capability, while robust heavy‑duty pistons and a high‑performance turbocharger further elevate durability and output. To minimize downtime, serviceability is made simple with both the oil filter and dual fuel filters strategically positioned for convenient top‑side access.
- 16:1 Compression Ratio
- Turbocharged and Charge Air Cooled
- 107 MM Bore
- 124 MM Stroke
- Performance Aluminum Intake Manifold
- Top-Feed Injectors, Updated Intake Port Geometry for Improved Breathing and Performance Over Previous Generations
- Cold-Start Capability with Advanced Glow-Plug Technology
- Cast-Iron Block
- Cast-Iron Cylinder Head
- Forged Steel Crankshaft
- Smart Diesel Exhaust Brake
- CP8 Fuel Pump with 2,200 Bar
TORQUEFLITE® HD 8-SPEED AUTOMATIC TRANSMISSION
The available High-Output 6.7L Cummins® Turbo Diesel I6 engine paired with the TorqueFlite® HD 8-speed automatic transmission is an unstoppable force, helping to provide smooth shifting, enhanced durability and optimized performance. This family of ZF Powerline Transmissions is designed for Class 3 through Baby 8 trucks, covering a wide range of medium- and heavy-duty commercial vehicle applications handling up to 57,000 pounds GCWR. On 3500 models, the maximum GCWR is 45,000 pounds. In combination with the 3.42 gear ratio in the rear axle, torque at launch improves almost 10% vs the previous generation Ram Heavy Duty pickup max tow setup—offering car-like drivability with truck-grade performance. Smooth, intelligent shifting makes every mile more comfortable—launching in 2nd gear when unladen and Tow-Haul Mode is off. Transmission Gear Ratios: 1st Gear – 4.89 8th Gear – 0.64
SMART DIESEL EXHAUST BRAKE
The Cummins® Turbo Diesel engine features a Diesel Exhaust Brake for optimal control. When the vehicle is traveling above 5 mph (8 km/hr) engage either of 2 operating modes: Full “Normal” Mode: Normal mode is active when the Exhaust Brake indicator is on and turned yellow. This mode allows the exhaust brake to automatically engage when the driver lets off the accelerator, applying full braking power. Automatic “Smart” Mode: Smart mode is active when the exhaust brake indicator is on and turned green. Smart mode applies varying braking power to maintain steady vehicle speed with less noticeable braking, only applying stronger braking as needed. This mode is designed for smoother operation on downhill grades.
LIMITED LONGHORN®
LIMITED
POWER WAGON®
REBEL®
LARAMIE®
BIG HORN®
WARLOCK
BLACK EXPRESS
TRADESMAN®
6.4L HEMI® V8 ENGINE
Built for heavy‑duty demands, the 6.4L HEMI® V8 features a cast‑iron block that delivers exceptional structural rigidity and durability, paired with lightweight aluminum cylinder heads that use hemispherical combustion chambers to improve airflow and heat dissipation. A forged steel crankshaft provides the strength needed to withstand high torque output and continuous heavy‑load operation. To support commercial customers’ need for additional electrical capacity, a dual‑alternator option is also available and is capable of supporting snowplow equipment, 120‑volt bed outlets, worksite lighting, and other high‑draw equipment.
- 10:1 Compression Ratio
- 104 MM Bore
- 95 MM Stroke
- Cast-Iron Block
- Aluminum Cylinder Head
- Hemispherical Combustion Chambers
- Forged Steel Crankshaft
- High-Pressure Cooler Exhaust Gas Recirculation
- Integrated Oil Cooler
- Multipoint Fuel Injection
- Stainless Steel Exhaust Manifolds
- Dual Alternator Option
TORQUEFLITE® 8-SPEED AUTOMATIC TRANSMISSION
The power of the 6.4L HEMI® V8 engine paired with the TorqueFlite® 8-Speed Transmission provides that Ram truck V8 power with responsive performance for a variety of driving conditions. The ZF 8HP75 is an advanced 8-speed automatic transmission designed to deliver a blend of power, smoothness and efficiency for modern trucks and light commercial vehicles, used across a wide range of applications. It’s part of ZF’s second-generation eight-speed family—known globally for reliability, quick shifting and high torque capability. Its proven architecture provides lightning-fast seamless shifts that keeps the engine in its ideal power range whether you’re accelerating onto the highway, towing a trailer or cruising in everyday traffic. Advanced software, skip-shift functionality and optimized gearsets help enable lower engine speeds, aimed at reducing fuel consumption and operating costs. Transmission Gear Ratios: 1st Gear – 4.71 8th Gear – 0.67
