The 2015 Dodge Ram 3500 is a full-size work truck powered by either gasoline-fueled V8 engines or a six-cylinder diesel engine. A properly equipped Ram 3500 fitted with a diesel engine and a heavy-duty automatic transmission is capable of towing up to 30,000 pounds.
The base engine for all 2015 Dodge Ram 3500 models is a 5.7-liter V8 that produces 383 peak horsepower and 400 foot-pounds of torque. The optional 6.4 liter V8 produces 410 horsepower in most configurations, though it is downgraded to only 370 horsepower if paired with the larger Mega Cab extended-cab option. The larger V8's 429 foot-pounds of torque remains constant regardless of the cab option chosen.
Buyers who opt for the six-cylinder turbocharged diesel engine in their Dodge Ram 3500 can pair the engine with one of three transmissions, each of which affect the output of the engine. A manual transmission limits the engine to 350 horsepower and 680 foot-pounds of torque, while a standard manual transmission increases these ratings to 370 horsepower and 800 foot-pounds of torque. Finally, the heavy-duty Aisin automatic transmission option allows the turbocharged diesel to produce 385 horsepower and an impressive 865 foot-pounds of torque, enabling the Dodge Ram 3500's class-leading towing performance.