What fluid does a Dodge transfer case use?

The fluid used in a Dodge transfer case is typically gear oil rather than automatic transmission fluid. The exact specification depends on the model and year of the vehicle.

In practice, most Dodge 4x4 transfer cases require an API GL-4 or GL-5 gear oil in the viscosity range of 75W-90 or 80W-90. Some newer or specialized units may call for synthetic gear oil or a different viscosity; always verify with the owner's manual, service manual, or the transfer-case designation on the fill plug.

How to determine the correct fluid for your Dodge transfer case

Identify your transfer-case model and year, then consult the official specification for the exact fluid type and viscosity. If the case has a fill plug tag, read it to confirm the required oil grade. Avoid using automatic transmission fluid unless the manufacturer explicitly specifies it for your unit.

To ensure you choose the right fluid, consider these general guidelines and then cross-check with your service documentation or dealer guidance.

• 75W-90 gear oil that meets API GL-4 or GL-5 is commonly recommended for many Dodge transfer cases.


• 80W-90 gear oil is another typical option when 75W-90 is not specified for a particular unit.


• Synthetic gear oils (75W-90 or 75W-140) may be preferred for cold climates, heavy towing, or severe service, but only if the manual allows it.


• Do not substitute automatic transmission fluid (ATF) unless a Dodge manual explicitly instructs you to use ATF in your transfer case.

Using the correct fluid helps maintain proper gear meshing, lubrication, and heat dissipation in the transfer case. Always refill to the level shown on the factory fill line and use a clean fill kit to avoid introducing contaminants.

Maintenance tips and best practices

Servicing your transfer case involves more than just selecting the right fluid. Follow these guidelines to keep the unit in good working order:

• Check for leaks around the fill and drain plugs and at seals; replace gaskets or seals if you notice seepage.


• Use fresh gear oil and avoid mixing different oil viscosities or brands unless the manual allows it.


• When performing a full drain and fill, replace the drain plug gasket and fill plug o-ring as needed.


• In extreme conditions (heavy towing, off-roading, or large temperature swings), consider synthetic gear oil and a full flush if the service interval calls for it.

Signs that your transfer-case oil needs attention include unusual whining, grinding noises, sluggish engagement, or leaks around the case. If you notice any of these issues, consult a technician and reference the vehicle’s service manual for the correct procedure and fluid specification.

Why the fluid choice matters

Choosing the correct fluid preserves the life of the gears and clutches inside the transfer case, maintains proper lubrication under varying loads, and helps prevent overheating. Mismatched fluids can cause accelerated wear or functional problems with engaging 4WD modes.

Summary

For most Dodge transfer cases, the standard fluid is gear oil (not ATF), typically in 75W-90 or 80W-90 with API GL-4/GL-5 specifications. Always verify the exact requirement from the owner’s manual, the transfer case tag, or the service manual for your model and year. Use clean oil, avoid mixing different fluids, and follow prescribed service intervals to keep the transfer case operating smoothly.

What kind of fluid does a 2017 Dodge Ram 1500 transfer case take?

The correct transfer case fluid for a 2017 Ram 1500 is an OE Mopar fluid that meets the BW44 specification, with part numbers like 68089195AA, 68049954AA, or 68049954AC. You can also use a high-quality, fully synthetic replacement fluid formulated for BorgWarner 44 transfer cases, which is often labeled as meeting the same specifications. 

• Fluid type: BorgWarner 44 transfer case fluid 
• Mopar part numbers:
  • 68089195AA 
  • 68049954AA 
  • 68049954AC 
• Alternative: A high-quality synthetic replacement fluid specifically designed for BorgWarner 44 transfer cases, such as the RAVENOL brand, can be used as a substitute. 
• Capacity: The transfer case typically holds approximately 1.4 to 1.8 liters (1.47 to 1.89 quarts) of fluid. 

What type of oil goes in a transfer case?

The correct transfer case oil type depends on your vehicle, with common options including automatic transmission fluid (ATF), specialized transfer case fluid, or gear oil (like 75W-90 or 80W-90). Always consult your owner's manual or the vehicle's specifications to determine the exact type, weight, and specifications (such as API GL rating) recommended by the manufacturer.
 
Common transfer case fluids 

• Automatic Transmission Fluid (ATF): Many modern vehicles use ATF, which is typically red. It may be a specific type like Dexron or Mercon, or a multi-vehicle formulation. 
• Specialized Transfer Case Fluid: Some modern and heavy-duty vehicles require fluids specifically designed for their transfer cases. These can be synthetic or conventional. Examples include Ford XL-12 and GM AutoTrak II. 
• Gear Oil: Older vehicles, particularly those with manual transfer cases, often use a thicker gear oil. Common types include 75W-90 or 80W-90, but it's crucial to check if it's the correct type for your transfer case, as some may require a non-EP (Extreme Pressure) type like GL-1 for manual gearboxes and transfer cases. 

How to choose the right fluid

• Check the owner's manual: This is the most reliable source. It will list the exact type, weight, and specifications required by the manufacturer. 
• Look for manufacturer-specific fluids: If your vehicle is a newer model or from a brand like Ford or GM, there may be a manufacturer-branded fluid recommended for optimal performance and compatibility. 
• Match the fluid type to the application: Consider whether your transfer case is a modern, multi-axle type or an older, heavy-duty one, and choose a fluid that matches the application's requirements. 
• Prioritize compatibility: Ensure the new fluid is compatible with the existing fluid, or perform a full flush to avoid potential issues. 

Are ATF and transfer case fluid the same?

Transfer case fluid and automatic transmission fluid (ATF) are not always interchangeable, though some transfer cases are designed to use ATF. Transfer case fluid is a specialized lubricant designed for the unique demands of a transfer case, while ATF is made for automatic transmissions. The correct fluid is determined by the vehicle manufacturer, and using the wrong type can cause damage.
 
This video explains how to choose the right fluid for Toyota differentials, transfer cases, and manual transmissions: 1mThe Car Care NutYouTube · Oct 13, 2021
Transfer Case Fluid

• Purpose: Specifically formulated for transfer cases, which are used in 4WD/AWD vehicles to distribute power to the front and rear axles. 
• Formulation: Contains additives to protect against wear, corrosion, and foaming, and may be a thicker oil, like gear oil, or a specialty synthetic fluid. 
• Usage: Required for many heavy-duty or off-road applications where the transfer case is under more stress. 

Automatic Transmission Fluid (ATF)

• Purpose: Designed for the hydraulic and mechanical systems within an automatic transmission. 
• Formulation: Specially formulated to handle the pressures and friction within a transmission. 
• Usage: Some vehicles, especially those with advanced control systems, are designed to use ATF in the transfer case because it handles hydraulic pressure well and operates efficiently in a wide range of temperatures. 

How to choose the right fluid

• Consult your owner's manual: This is the most important step to identify the exact fluid your vehicle needs. 
• Do not interchange: Using ATF in a transfer case not designed for it, or gear oil in a transmission, can lead to damage. 
• Check specialty fluids: In some cases, like certain GM trucks, specific transfer case fluids were developed to replace older fluids that are no longer available and are not compatible with the newer versions of ATF. 

What kind of transfer case fluid for 2019 Dodge Ram 1500?

The correct transfer case fluid for a 2019 Ram 1500 is either the recommended Mopar transfer case lubricant or a substitute like Mobil Fluid LT, which is a specific ATF fluid for the 48-11 transfer case. The fluid capacity is approximately 1.31.31.3 liters (1.81.81.8 quarts) for the 48-11 model. Always confirm the exact specification with your owner's manual or a dealership, as different transfer case options may exist.
 
You can watch this video to learn how to change the transfer case fluid on a 2019 Ram 1500: 52sBlaupartsYouTube · Aug 4, 2022
Fluid type

• Mopar Transfer Case Lubricant: The manufacturer's specific recommendation. 
• Mobil Fluid LT: A recommended substitute for the 48-11 transfer case, which is common on the 2019 Ram 1500. 
• ATF: Some sources indicate an automatic transmission fluid (ATF) is suitable, especially for the 48-11 transfer case model which uses an ATF-based fluid. 

Capacity

• For the 48-11 transfer case: Approximately 1.31.31.3 liters or 1.81.81.8 quarts. 

Important considerations

• Confirm your specific transfer case model: Some 2019 models may have different transfer cases. The 48-11 is common, especially if the truck has the "4WD Auto" button. 
• Consult your owner's manual: The owner's manual is the most reliable source for your specific vehicle. 
• Check with a dealer: If you are unsure, a dealership can confirm the correct part number or fluid type based on your truck's VIN. 

This video demonstrates how to change the rear differential fluid on a 5th gen Ram 1500: 52sUltimate Tool Reviews YouTube · Jan 30, 2025