The Ram 3500 uses two main transmissions depending on the engine: an 8-speed automatic for gasoline engines and a 6-speed AISIN automatic for the 6.7L Cummins diesel. Exact transmission model numbers can vary by model year and market.
Overview of transmission options by engine
The Ram 3500 lineup pairs its engines with transmissions designed to handle heavy torque and towing. For modern models, gasoline versions are equipped with an eight-speed automatic, while the heavy-duty Cummins diesel uses a six-speed automatic built by AISIN. Variations in the specific transmission family and part numbers are common across different model years.
Below is a concise look at the typical factory pairings. The exact configuration for a given vehicle should be confirmed from the window sticker or the VIN data for that build.
- Gasoline engines (5.7L Hemi V8 and 6.4L Hemi V8): paired with an eight-speed automatic transmission (TorqueFlite 8HP70/8HP75, depending on year and calibration).
- Cummins 6.7L Turbo Diesel: paired with a six-speed AISIN automatic transmission (AS68RC/AS69RC, depending on year).
In practice, engine choice drives the transmission option, but model-year updates can adjust the exact transmission family or calibration. For the most accurate information about a specific Ram 3500, check the build sheet or contact a dealer with the VIN.
Why the pairing matters
The eight-speed automatic in gasoline Ram 3500s is tuned for smooth shifts and improved highway efficiency, which supports towing and payload demands. The six-speed AISIN in the Cummins diesel is designed to handle very high torque, enabling strong low-end response and durability when pulling heavy loads.
What this means for buyers
If you’re shopping for a Ram 3500, know that:
- If you’re choosing a gasoline model, you’ll be dealing with an eight-speed automatic transmission.
- If you’re choosing the diesel, you’ll be dealing with a six-speed AISIN automatic transmission.
- Exact transmission model numbers and internal calibrations vary by model year, trim, and market.
Summary
The Ram 3500 typically pairs gasoline engines with an eight-speed automatic transmission and the 6.7L Cummins diesel with a six-speed AISIN automatic. Model-year changes can alter the precise transmission family or part numbers, so verify the exact configuration for a specific vehicle using the VIN or the window sticker.