The 5.9-liter Cummins diesel, used in Dodge Ram pickups from 1989 through 2007, was paired with several different transmissions over its production life. Depending on the year and model, you’ll typically find either a manual or an automatic transmission, with several specific units common in different eras.
Overview of transmission options by era
The 5.9 Cummins was offered with a mix of manual and automatic transmissions across its production run. Below are the main transmissions most commonly seen with this engine, noted for their use in Dodge Ram 3/4- and 1-ton trucks.
Before diving into the list, note that exact fitment can vary by model year, cab configuration, and whether the truck was built for heavy-duty use. Always verify with the vehicle’s VIN or build sheet before purchasing a replacement.
- Getrag 360 — a 5-speed manual transmission used on early 5.9 Cummins installations (roughly late 1980s to mid-1990s). It’s the original manual option found in many of the first-generation Cummins-equipped Rams.
- NV4500 — a robust 5-speed manual that became a common choice in Ram 2500/3500 trucks in the late 1990s into the early 2000s. It’s widely recognized as a durable, aftermarket-friendly option for late-1990s to mid-2000s builds.
- NV5600 — a 6-speed manual introduced for later Ram heavy-duty applications, used with some 5.9 Cummins-equipped trucks in the early-to-mid 2000s (primarily 2003–2007 in various configurations).
Concluding note: the manual options above reflect the most frequently seen combinations, but some trucks may have different or replaced units based on ownership, retrofit, or regional specifications.
- 47RE — a 4-speed automatic that was used behind the 5.9 Cummins in several Ram models during the late 1990s into the early 2000s. It’s commonly found in later 24-valve builds paired with automatic transmission setups.
- 48RE — a heavier-duty 4-speed automatic that followed the 47RE in many Ram trucks with the 5.9 Cummins, used through the early-to-mid-2000s in heavier applications.
Concluding note: automatic transmissions in the 5.9 Cummins lineup were more prevalent in later years as Dodge migrated toward more robust auto options for heavy-duty use, while some early builds utilized simpler automatics.
How to identify your transmission
If you’re trying to confirm the exact unit on a specific vehicle, use these quick methods to identify the transmission installed with the 5.9 Cummins:
Manual transmissions
Look for markings or badges on the shifter or on the transmission itself. Common manual units include the Getrag 360, NV4500, and NV5600. The NV4500 and NV5600 are typically most easily identified by their bolt-patterns and case shape, while the Getrag 360 is the earlier, smaller 5-speed unit.
Automatic transmissions
Check the transmission case for model stamps or a build tag. The 47RE and 48RE are the primary automatic options associated with the 5.9 Cummins in its later years. The presence of a more robust, heavy-duty transmission family (like the 48RE) often corresponds with heavier-duty truck configurations.
Summary
The 5.9 Cummins has been paired with several transmissions across its production run, including the Getrag 360 (early 5.9s), the NV4500 (5-speed manual), the NV5600 (6-speed manual), and Chrysler’s automatic options, notably the 47RE and 48RE. Year, model, and intended use all influence which transmission your truck came with. For precise identification, verify the specific vehicle’s VIN/build sheet or inspect the transmission tag for the exact model number.