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What fluid should I run in my transfer case?

The fluid you should use in your transfer case depends on the specific make and model of your vehicle. In general, you should use the fluid recommended by the manufacturer, which is typically a specialized transfer case fluid or a high-quality gear oil. Using the wrong fluid can lead to damage or premature wear of the transfer case components.


Understanding Transfer Case Fluids


The transfer case is a critical component in four-wheel-drive and all-wheel-drive vehicles, responsible for distributing power from the transmission to the front and rear axles. The fluid in the transfer case serves several important functions, including:



  • Lubricating the gears, bearings, and other moving parts to reduce wear and friction

  • Helping to dissipate heat generated during operation

  • Protecting against corrosion and rust

  • Maintaining the proper viscosity for efficient power transfer


Using the wrong fluid can compromise the transfer case's performance and lifespan, leading to expensive repairs down the line.


Choosing the Right Fluid


The best fluid to use in your transfer case is the one recommended by the vehicle manufacturer. This information can typically be found in your owner's manual or on the manufacturer's website. Some common transfer case fluid types include:



  • Transfer case fluid: A specialized fluid designed specifically for transfer cases, often containing additives to improve performance and durability.

  • Gear oil: A high-quality gear oil, such as SAE 75W-90 or 80W-90, may be recommended for some transfer cases.

  • Automatic transmission fluid (ATF): Some transfer cases may specify the use of a particular type of ATF, such as Dexron or Mercon.


It's important to follow the manufacturer's recommendations to ensure the proper fluid is used, as using the wrong fluid can lead to premature wear, leaks, or even complete failure of the transfer case.


Maintaining Your Transfer Case


In addition to using the correct fluid, it's important to regularly check and maintain the fluid level in your transfer case. Most manufacturers recommend checking the fluid level and changing the fluid at regular intervals, typically every 30,000 to 60,000 miles or as specified in your owner's manual.


By following the manufacturer's recommendations and using the right fluid, you can help ensure your transfer case operates smoothly and reliably for the life of your vehicle.

What is the best fluid to put in a transfer case?


ATF+4 is the prefered fluid by manufacture New Venture. However most any ATF fluid is acceptable with no harmfull . Huydraulic oil, engine oil and light gear oil will also work fine. Why try to outthink the engineer?



What fluids need to be changed in a 4x4 truck?


Regularly check and top up the fluids in your 4x4, including engine oil, transmission fluid, coolant, and differential fluids. Off-road adventures can put additional strain on these systems, so proper fluid levels and condition are critical.



What is the difference between 44 and 44 short?


A: 44 is the measurement (in inches) around the widest part of the chest. Short refers to the sleeve length and the overall jacket cut. Sleeve length 31-32 inches is "Short", 33-34 inches is "Regular", 35-36 inches is "Long" (sometimes "Tall" when discussing jackets).



What fluid does a Dodge transfer case use?


Ram recommends the use of a licensed ATF+4® MS-9602 specification fluid for the NV241, NV243, NV244, NV271, and NV273 type transfer case fluid change. This is an ATF for the transfer case.



How often do you change the fluid in a 4WD transfer case?


every 30,000 to 60,000 miles
The general recommendation is to replace the transfer case fluid every 30,000 to 60,000 miles. However, it's crucial to consult your vehicle's owner manual for the manufacturer's specific interval.



What is the difference between 44-44 and 44 45?


The BW 44-45 transfer case is identical to the 44-44 but operates as an electronically controlled part-time transfer case with SOF (shift on the fly) capability. The operation is the same except for the control system, which has only four operating ranges: 2 High, 4WD Lock, Neutral and 4WD Low.



Is a transfer case fluid necessary?


This fluid plays a vital role in lubricating the gears, chains, and bearings inside the transfer case, which transfers power from the engine to both the front and rear axles. Over time, the fluid breaks down due to heat and mechanical wear, reducing its effectiveness.



What is the size difference between a 44 and 45?


Cartridge Specs
The 44 Magnum has a case length of 1.285” and overall length of 1.61” compared to 0.898” and 1.275”, respectively, for the 45 ACP.



Can I use transmission fluid in a transfer case?


Transfer case is not picky at all. You can run any ATF, you can also run motor oil or a light gear oil. It really just needs lubrication and ATF is a lightweight one that does the job. No need to be concerned about what brand.



What happens if you never change transfer case fluid?


It's entirely possible for your transfer case to end up damaged if it runs low on transfer case fluid for too long. It's also possible to damage the transfer case if you use motor oil or other incompatible fluids to top it up.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.