On a 1999 Dodge Ram 2500, the transmission could vary based on the engine and options; the most common configurations were the 46RE automatic on gasoline models and the 47RE automatic on diesel models, with some trucks offering manual transmissions like the NV4500 or NV5600 depending on the build.
Transmission configurations by engine and option
The following breakdown shows the main transmissions you might encounter on a 1999 Ram 2500, depending on the engine and configuration.
- Gasoline engines (5.2L/5.9L Magnum): the typical setup was the 46RE four-speed automatic; a small number were equipped with the NV4500 five-speed manual in certain heavy-duty configurations.
- Cummins diesel engines (5.9L 24-valve or similar): the common setup was the 47RE four-speed automatic; some late-year models offered the NV5600 six-speed manual.
Note that exact transmission pairing depends on production date and options; verify with the VIN/build sheet for your specific truck.
How to identify the transmission on your 1999 Ram 2500
To determine the exact transmission on a specific truck, use these identification steps.
- Inspect the transmission case or a data tag: look for model codes like 46RE, 47RE, NV4500, or NV5600.
- Check the shift pattern and the number of gears: automatics show PRNDL with four forward speeds, while manual NV4500 has five gears and NV5600 has six.
- Review the VIN or window sticker to confirm the original equipment list (OE). If you have access, contact a Chrysler/Dodge dealer with the VIN for the exact transmission.
- Examine service records or the owner's manual for the factory-installed transmission type.
With these steps, you can accurately identify the transmission in a 1999 Ram 2500. If in doubt, a qualified mechanic can verify by inspecting the casing numbers or transmission internals.
Summary
The 1999 Dodge Ram 2500 offered multiple transmissions depending on the engine option and build. The most common pairing was the 46RE automatic on gasoline models and the 47RE automatic on diesel models; manual options included the NV4500 or NV5600 in certain configurations. To confirm the exact transmission on a specific truck, check the VIN/build sheet or consult a dealer or experienced technician.