The short answer: about 11 quarts for a pan drain with a new filter, and around 14 quarts for a full system flush that includes the torque converter. Actual needs vary with the maintenance method and vehicle configuration.
The 2003 Ram 1500 with a 4.7 L engine typically uses the 46RE automatic transmission. Fluid capacity can differ slightly based on whether you’re performing a simple pan drain, replacing the filter, or doing a complete flush, as well as whether the truck is 2WD or 4WD. The figures below reflect common industry guidance and service manuals.
Typical transmission fluid capacities by service method
The following figures are commonly cited by technicians and manuals for this transmission. They serve as practical guidelines when planning a fluid change.
- Pan drain and filter replacement: about 11 quarts
- Full system flush (including torque converter): about 14 quarts
- Additional top-off allowance: 1–2 quarts, depending on how much fluid remains in the system after draining and refilling
Concluding note: For a routine pan drain and filter change, plan on roughly 11 quarts of ATF; for a comprehensive flush, budget around 14 quarts. Always verify with the service manual and check the dipstick after warming up the transmission.
Practical steps for planning and performing the service
If you’re preparing to service the transmission yourself, here are the typical steps technicians follow, with preparatory guidance.
- Choose the correct ATF type: Mopar ATF+4 (or an equivalent that meets Chrysler specifications) is commonly recommended for the 46RE; confirm your vehicle’s requirements in the owner's or service manual.
- Warm up the vehicle to operating temperature to ensure an accurate fluid level reading.
- Drain the transmission pan, replace the filter, and reseal the pan with a new gasket; torque to specification.
- Fill with the recommended ATF amount to begin (start with about 8–9 quarts after a pan drain, then run through gears and check level).
- Cycle through all gears, hold in each gear briefly, and then recheck the level with the engine running and the transmission warmed up to operating temperature. Add fluid in small increments until the dipstick shows the correct level.
Note: These steps provide a general framework. Always follow the exact procedure and capacities listed in your factory service manual for your specific transmission revision and drivetrain configuration.
Summary
For a 2003 Dodge Ram 1500 with a 4.7 L engine, plan on about 11 quarts of ATF for a simple pan drain and filter change, and about 14 quarts for a full system flush that includes the torque converter. Use the correct ATF specification and verify levels after warming the transmission and cycling through the gears. When in doubt, consult the official service documentation or a qualified technician.