In brief: the 2012 Ram 3500 offered different transmissions depending on engine and configuration. Diesel-equipped trucks could be paired with either a 6-speed manual or a 6-speed automatic, while gasoline models typically used a 5-speed automatic.
Powertrain options and transmissions
The 2012 Ram 3500 was available with two engines: a 5.7L Hemi V8 gasoline engine and a 6.7L Cummins Turbo Diesel. Each engine line offered distinct transmission choices, with more manual options available on the diesel side.
Transmission options by engine configuration are summarized below:
- 5.7L Hemi V8 — 5-speed automatic (545RFE) was standard; manual transmission was not commonly offered on the heavy-duty Ram 3500 in 2012.
- 6.7L Cummins Turbo Diesel — both a 6-speed manual (NV5600) and a 6-speed automatic (69?RFE/AISIN) were available depending on the specific configuration and trim.
Overall, diesel models offered both manual and automatic options, while most gasoline-hybrid-heavy-duty configurations used the 5-speed automatic.
Notes on availability
Transmission availability could vary by cab/bed configuration, 4x4 vs. 4x2, and market. Always check the exact vehicle’s build sheet or VIN to confirm the factory-installed transmission.
Why the transmission matters
The choice of transmission affects towing capability, durability under heavy loads, and drive feel. For buyers examining a 2012 Ram 3500, knowing the exact engine and cab configuration helps identify the matching transmission.
Summary
The 2012 Ram 3500 offered multiple transmissions: diesel models could be paired with either a 6-speed manual NV5600 or a 6-speed automatic (AISIN 68RFE family), while the gasoline 5.7L Hemi generally used a 5-speed automatic (545RFE). Exact availability depended on the truck’s specific configuration, so verify the VIN/build sheet for the precise transmission in a given vehicle.