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A six-speed manual transmission is only offered with the 6.7L Cummins Turbo Diesel engine, and a six-speed automatic transmission is offered with the 6.4L HEMI V8 engine. If you want more capability with the powertrain, you can choose the available AISIN six-speed automatic transmission. This is an electronically controlled automatic rear-wheel drive transmission that can handle high engine output.
The engines that are offered with the Ram 3500 are a 6.7L Cummins Turbo Diesel I6 engine and a 6.4L HEMI V8 engine. The 6.7L Cummins engine can reach 385 horsepower and 930 lb.-ft. of torque, and the 6.4L HEMI V8 engine can reach up to 410 horsepower (best-in-class) and 429 lb.-ft. of torque.