For the vast majority of Ram 3500 models equipped with automatic transmissions, Mopar ATF+4 is the recommended fluid. Always verify your exact requirements in the owner's manual or by checking the transmission code plate, since some configurations or markets may differ.
Identify your transmission to know what fluid to use
Ram 3500 trucks have used multiple automatic transmissions over the years. The fluid recommendation depends on the transmission family and year. Start by identifying the transmission model and then confirm the fluid specification with the manual or a dealer.
How to identify the transmission type in your Ram 3500:
- Check the vehicle’s build sheet, window sticker, or the under-hood transmission tag for the exact model code (common codes include 68RFE, 545RFE, or AS68RC).
- Consult the owner's manual or the service/owners portal using your VIN to pull the exact specification.
- Ask a Ram dealer or a qualified technician if you’re unsure about the transmission family tied to your VIN.
Conclusion for this section: Correctly identifying the transmission ensures you select the right fluid and avoid seal or shifting issues later.
Fluid recommendations by transmission family
Below are the general guidelines that apply to the common Ram 3500 automatic transmission families. Always cross-check with Mopar’s official guidance or your owner's manual before purchasing.
- 68RFE and related 6‑speed automatics (older to mid‑2010s Ram 3500s): Mopar ATF+4 is typically specified and widely used for these units.
- AS68RC (Aisin) 6‑speed transmissions used in many later Ram 3500s: Mopar ATF+4 is also the standard recommendation, with Dexron VI not advised unless explicitly approved by the manual or dealer.
Notes: Some special editions or markets may list alternative fluids, but the prevailing guidance for Ram heavy‑duty automatics has been ATF+4. If your manual lists Dexron VI or another specification, follow that exactly. If in doubt, contact a Ram service center with your VIN for a definitive fluid specification.
Maintenance tips: changing transmission fluid correctly
When servicing the transmission, use the recommended ATF+4 fluid, and replace the transmission filter if your model has a replaceable filter. Fluid capacity and drainage procedures vary by transmission type and model year, so follow the service manual. Use the proper funnels and a clean environment to avoid introducing contaminants into the transmission.
- Ensure you use the exact Mopar ATF+4 specification compatible with your transmission family; avoid non‑ATF+4 fluids unless your manual allows them.
- Change the fluid with the engine warm, and follow the proper pan drain or flush procedure as prescribed in the service manual.
- Replace the transmission filter if your Trans has a serviceable filter during a fluid change.
Conclusion for maintenance: Regular maintenance with the correct ATF+4 fluid helps maintain smooth shifting and long transmission life.
Special cases: manual transmissions and other considerations
Some Ram 3500 configurations may use a manual transmission or a special sealed system where a factory fluid different from ATF+4 is specified. In those cases, refer to the owner’s manual or the service bulletin for the exact fluid type (often a specific manual transmission oil). If you’re unsure, consult a dealer or a trusted shop to avoid inadvertently damaging gears or seals.
Summary: For most Ram 3500 automatics, Mopar ATF+4 is the standard fluid. Always confirm your specific transmission type and year from the VIN, manual, or dealer documentation. When in doubt, rely on the official Mopar specification to ensure proper shifting, temperature performance, and protection of the transmission seals.
What ATF does a 68RFE take?
ATF+4
8 liters of Eurol fully synthetic ATF 1100 developed and engineered for the Ram 3500 68RFE and 66RFE 6-speed transmission. Meets or exceeds the recommended MS-9602 ATF+4 transmission fluid type specification. Also known as part number 68218057AA or 68218058AC ATF automatic transmission fluid.
How many quarts of transmission fluid does a Dodge Ram 3500 take?
Automatic Transmission Fluid
Capacity: 6 speed AS69RC Total Fill 13.7 quarts. Capacity: 7.2 quarts Initial Fill.
Can low transmission fluid cause stuttering?
If shuddering occurs primarily between 30-45 mph, this suggests torque converter problems related to low fluid levels. This specific speed range often reveals transmission issues that might not be noticeable at other speeds.
What kind of transmission fluid does a 6.7 Cummins take?
Recommended: BLUE DIAMOND ATF+4/DEXRON III/MERCON V transmission fluid.