What Fluid Does a 2012 Infiniti AWS Transfer Case Take? A Comprehensive Guide

Owning and maintaining a luxury vehicle like the 2012 Infiniti means paying attention to the smallest details to ensure optimal performance and longevity. One of the often-overlooked components in a car’s drivetrain system is the transfer case, particularly in vehicles equipped with All-Wheel Steering (AWS), such as the 2012 Infiniti models. The transfer case plays a vital role in transferring power from the transmission to the front and rear axles, and ensuring it is properly lubricated with the correct fluid is crucial for the system’s functionality.

But what fluid does a 2012 Infiniti AWS transfer case take? This is a question that many Infiniti owners and automotive enthusiasts find themselves asking, particularly because using the wrong fluid can lead to significant damage to the drivetrain. In this comprehensive article, we will delve deep into the intricacies of the 2012 Infiniti AWS transfer case, explore the recommended fluids, analyze why choosing the correct fluid matters, and provide insights to help you keep your vehicle running smoothly.

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Understanding the Role of the Transfer Case in the 2012 Infiniti with AWS

Before addressing what fluid does a 2012 Infiniti AWS transfer case take, it’s essential to understand the transfer case’s role in the overall functioning of the car, especially in models equipped with the All-Wheel Steering (AWS) system.

The transfer case is a critical component in four-wheel-drive (4WD) and all-wheel-drive (AWD) vehicles. It’s responsible for splitting the power generated by the engine and distributing it to the front and rear axles. This distribution of torque allows the vehicle to have better traction and control, especially in adverse conditions like rain, snow, or off-road terrain.

In the case of the 2012 Infiniti models with AWS, the transfer case not only distributes power but also works in conjunction with the AWS system, which controls the steering angle of the rear wheels. This system enhances the vehicle’s stability, handling, and cornering capabilities, making it a key feature in the driving dynamics of the Infiniti. Given the complexity of these systems working together, maintaining the proper fluid levels and using the correct fluid is paramount to ensure the longevity and performance of the vehicle.

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What Fluid Does a 2012 Infiniti AWS Transfer Case Take?

When it comes to the 2012 Infiniti AWD transfer case, the factory recommendation from Nissan and Infiniti has traditionally been a 90-weight gear oil, such as 80W-90. However, many mechanics and Infiniti owners have found that the fluid that actually comes out of the transfer case is a bright red transmission fluid, which has a completely different viscosity and composition compared to gear oil.

So, the answer to what fluid does a 2012 Infiniti AWS transfer case take can be confusing, but based on field experience and input from experienced mechanics, the fluid most suitable for the 2012 Infiniti AWS transfer case is a type of automatic transmission fluid (ATF) rather than heavy gear oil.

The Recommended Fluid: Automatic Transmission Fluid (ATF)

Most commonly, the transfer case in the 2012 Infiniti, especially in the AWD models, uses ATF that matches the specifications of Dexron III or Mercon. This bright red fluid is the same type used in automatic transmissions, but in this case, it provides the necessary lubrication and cooling to the components inside the transfer case.

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Why Automatic Transmission Fluid (ATF) and Not Gear Oil?

The reason why ATF is better suited for the 2012 Infiniti AWS transfer case compared to traditional gear oil like 80W-90 lies in its viscosity, temperature stability, and flow characteristics.

1. Viscosity: Gear oil is thicker and more viscous compared to ATF. While thicker fluids are beneficial for components like differentials, the transfer case in an Infiniti operates at higher speeds and temperatures, where a lower viscosity fluid like ATF is better suited to flow efficiently and lubricate all the necessary parts.
2. Temperature Stability: ATF is designed to handle the extreme heat generated inside an automatic transmission, which makes it ideal for the high temperatures encountered within a transfer case. The fluid ensures that the transfer case remains cool, especially during high-stress situations like towing or off-roading.
3. Flow Characteristics: Because the transfer case has many moving parts and operates at varying speeds, the fluid needs to flow smoothly and consistently throughout the system. ATF’s lower viscosity ensures that it can reach every component, providing optimal lubrication and reducing wear and tear.

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Steps to Changing the Fluid in a 2012 Infiniti AWS Transfer Case

Now that we’ve answered what fluid does a 2012 Infiniti AWS transfer case take, it’s important to know how to change the fluid in the transfer case to ensure it stays in peak condition. Below is a step-by-step guide for performing a transfer case fluid change.

Tools and Materials You’ll Need:

• Automatic Transmission Fluid (ATF), Dexron III or Mercon (Ensure it meets Infiniti’s specifications)
• Ratchet set with appropriate socket sizes
• Fluid pump to refill the transfer case
• Drain pan to catch the old fluid
• Gloves and safety goggles

Step-by-Step Guide:

1. Locate the Transfer Case: The transfer case is typically located behind the transmission, underneath the vehicle. You’ll need to jack up the car and place it on stands for easy access.
2. Drain the Old Fluid: Find the drain plug on the transfer case, which is usually located at the bottom. Place the drain pan underneath, remove the plug using the ratchet, and allow the old fluid to drain out completely. The fluid may be bright red (ATF) or appear dark if it hasn’t been changed in a while.
3. Inspect the Drain Plug: Clean the drain plug and check for any metal shavings or debris that may indicate excessive wear in the transfer case.
4. Replace the Drain Plug: Once the fluid has completely drained, replace the drain plug and tighten it securely.
5. Refill the Transfer Case: Using the fluid pump, refill the transfer case with the recommended ATF fluid. The fill plug is usually located higher on the transfer case. Fill the case until the fluid starts to seep out of the fill hole.
6. Replace the Fill Plug: After filling, replace the fill plug and tighten it securely.
7. Check for Leaks: Lower the vehicle, start the engine, and allow it to run for a few minutes. Check underneath the vehicle to ensure there are no leaks from the drain or fill plugs.
8. Test Drive: Take the vehicle for a short test drive to ensure the transfer case is operating smoothly and the fluid change has been successful.

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Why Using the Correct Fluid Matters for Your 2012 Infiniti AWS Transfer Case

Using the correct fluid in the transfer case of your 2012 Infiniti is crucial for several reasons. Failure to use the right fluid can lead to a host of issues, including:

1. Excessive Wear and Tear

If you use the wrong fluid—such as gear oil instead of ATF—the transfer case components will not receive the necessary lubrication. The thick gear oil may not flow as efficiently through the system, leading to friction, overheating, and excessive wear on parts like the chain, gears, and bearings.

2. Overheating

The transfer case can generate a lot of heat, especially when the vehicle is under heavy load. ATF is formulated to dissipate heat effectively, whereas gear oil may not provide the same level of temperature control, leading to overheating and potential damage to the transfer case.

3. Potential for Transfer Case Failure

If the wrong fluid is used over time, it can lead to complete transfer case failure, which would require expensive repairs or even replacement. The cost of replacing a transfer case can run into the thousands of dollars, whereas using the correct fluid is a relatively low-cost maintenance procedure that can prevent such issues.

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FAQs About the 2012 Infiniti AWS Transfer Case and Fluid

Q1: What fluid does a 2012 Infiniti AWS transfer case take?

A1: The correct fluid for the 2012 Infiniti AWS transfer case is Automatic Transmission Fluid (ATF), specifically Dexron III or Mercon, as it provides the necessary lubrication and cooling for the transfer case components.

Q2: Can I use gear oil like 80W-90 in my 2012 Infiniti AWS transfer case?

A2: No, using gear oil like 80W-90 is not recommended. While early recommendations from Nissan might have suggested gear oil, experience has shown that ATF is the correct fluid to use for optimal performance and to prevent damage.

Q3: How often should I change the transfer case fluid in my 2012 Infiniti?

A3: It is recommended to change the transfer case fluid approximately every 30,000 to 60,000 miles, depending on driving conditions. If you frequently drive in harsh conditions (snow, mud, or off-road), you may need to change the fluid more frequently.

Q4: Can I change the transfer case fluid myself, or should I go to a mechanic?

A4: While it’s possible to change the transfer case fluid yourself if you have the proper tools and experience, many Infiniti owners prefer to have a mechanic perform the service to ensure it’s done correctly. Transfer case fluid changes are generally quick and inexpensive when done by a professional.

Q5: What happens if I don’t change the transfer case fluid regularly?

A5: Failing to change the transfer case fluid can lead to increased friction, overheating, and ultimately, transfer case failure. Regular fluid changes ensure that the transfer case remains properly lubricated and functioning smoothly.

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Conclusion

In answering the question, what fluid does a 2012 Infiniti AWS transfer case take, the clear consensus is that Automatic Transmission Fluid (ATF), specifically Dexron III or Mercon, is the most suitable fluid for ensuring optimal performance and longevity. While some may be confused by early recommendations of gear oil, field experience shows that ATF provides the necessary lubrication, temperature control, and flow characteristics required by the transfer case in these vehicles.

Regular maintenance, including timely fluid changes, is essential for preventing issues and ensuring your 2012 Infiniti continues to perform at its best. With the right fluid and proper care, your vehicle’s AWD system and transfer case will provide many more miles of reliable service.

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