2019 Ram 3500 Fluid Type Specifications

Quick reference

Engine Oil

The 2019 Ram 3500 was available with two primary engine options: the 6.4L Hemi V8 gasoline engine and the 6.7L Cummins Turbo Diesel engine. Each requires a specific type and weight of engine oil.

For the 6.4L Hemi V8, the factory recommendation is 0W-20 engine oil meeting API SN or SP standards and Chrysler material standard Mopar MS-6395. The oil capacity is approximately 7.0 quarts (6.6 liters). It's crucial to use the correct weight and specification for optimal engine performance and longevity. Using a different weight or an oil that does not meet the MS-6395 spec can lead to premature wear, reduced fuel economy, and potential warranty issues. Always check your owner's manual for the most up-to-date information regarding oil specifications and change intervals, but generally, the change interval for normal service is 10,000 miles or 12 months, whichever comes first.

For the 6.7L Cummins Turbo Diesel, the factory recommendation is either 10W-30 or 5W-40 for colder climates, meeting API CJ-4 or CK-4 standards. Specific Cummins material standards include CES 20081 or CES 20086. The oil capacity for the 6.7L Cummins is substantial, at approximately 12.0 quarts (11.3 liters). Diesel engines operate under much higher pressures and temperatures, requiring robust oil formulations. The CK-4 specification is a newer standard designed to provide improved shear stability, oxidation resistance, and aeration control. Always verify the specific API service category your owner's manual calls for. The change interval can vary significantly based on duty cycle and oil analysis, but typically ranges from 10,000 to 15,000 miles under normal conditions. Using an oil that does not meet the specified API CJ-4/CK-4 or Cummins CES standards can lead to severe engine damage, DPF clogging, and injector issues.

Engine Coolant

The 2019 Ram 3500 requires Mopar MaxPro Antifreeze/Coolant, which is a Purple, OAT (Organic Acid Technology) formulation, conforming to Chrysler material standard MS-90032. The cooling system capacity is approximately 18.0 to 20.0 quarts (17.0 to 18.9 liters), depending on the engine and specific vehicle configuration. OAT coolants are designed for extended service intervals, typically 10 years or 150,000 miles. It is absolutely critical NOT to mix different coolant technologies, especially OAT with HOAT (Hybrid Organic Acid Technology) or IAT (Inorganic Additive Technology) coolants, as this can lead to chemical reactions, gel formation, corrosion, and catastrophic engine damage. Always use the specified Mopar MaxPro OAT coolant or an equivalent that explicitly states compliance with MS-90032. If a complete flush and fill is performed, ensure all old coolant is removed to prevent mixing.

Transmission Fluid

Depending on the engine and drivetrain configuration, the 2019 Ram 3500 could be equipped with either the 68RFE automatic transmission (typically with the 6.4L Hemi) or the Aisin Seiki AS69RC automatic transmission (typically with the 6.7L Cummins).

For vehicles equipped with the 68RFE automatic transmission, the required fluid is Mopar ATF+4. The dry fill capacity is approximately 17.5 quarts (16.5 liters). ATF+4 is a highly specific synthetic fluid developed for Chrysler transmissions. NEVER use universal or multi-vehicle ATF in a 68RFE, as it can lead to shifting problems, premature wear, and transmission failure. Transmission fluid and filter changes are typically recommended between 60,000 and 120,000 miles, depending on usage (e.g., heavy towing requires more frequent changes).

For vehicles equipped with the Aisin AS69RC automatic transmission, the required fluid is Aisin Warner ATF-AWF8, also known as Mopar AS69RC ATF. The dry fill capacity is approximately 16.9 quarts (16.0 liters). This is a very specific fluid for the Aisin transmission and substitutes should be avoided. Consult your owner's manual for specific maintenance intervals, especially for vehicles used for heavy-duty applications.

Transfer Case Fluid

The 2019 Ram 3500 with 4WD/AWD typically uses a BorgWarner transfer case (e.g., BW 44-46 or BW 44-48). The specified fluid for these transfer cases is Mopar ATF+4. The capacity ranges from approximately 1.6 to 2.0 quarts (1.5 to 1.9 liters). Similar to the 68RFE transmission, using anything other than Mopar ATF+4 can cause damage to the transfer case. Change intervals are usually around 60,000 miles or more frequently if the vehicle is regularly used for off-roading or heavy towing.

Differential Fluid

The 2019 Ram 3500 typically uses American Axle & Manufacturing (AAM) differentials—specifically, 11.5-inch front and rear axles are common in the 3500 series.

For both the front and rear differentials, the specified gear oil is 75W-90, API GL-5. The front differential capacity is approximately 3.2 quarts (3.0 liters). The rear differential capacity is approximately 4.2 quarts (4.0 liters).

Crucially, if your vehicle is equipped with a limited-slip differential (LSD), the rear differential will also require a friction modifier additive in addition to the GL-5 gear oil. Some GL-5 oils come with friction modifier already included (