What type of fluid does the Subaru front differential? The synthetic fluids come with label of a 75W-90 rating and a GL-5 marking. It also can be regular and mineral gear oils with similar grades.
Knowing the Subaru front differential fluid type is vital as it helps the differentials to avoid wear and friction. At the same time, the compatible fluid keeps the engine running smoothly and extends its life expectancy.
Besides, choosing the wrong ones or using old fluid for more than recommended mileage will cause several engine and transmission issues. And if you drive your vehicle with those problems, it’ll be out of work after a while.
No worries since you’re reading this post. It’ll help you learn about the Subaru differential fluid type, the symptoms of damaged fluid, how to replace old fluid, and much more related information.
Subaru Front Differential Fluid Type: How Many Variants Are There?
Like the lubrication, the automatic front differential differs from the manual one on the Subaru. Similarly, it uses different types of fluid for the differentials, also refers as diff.
The Subaru manufacturer recommends using synthetic fluid. Also, you can use mineral and normal diff fluids. However, you must ensure a grade of 75W-90 and a GL5 standard.
For example, if you’re looking for a 2010 Subaru Forester front differential fluid type, you must choose the fluid labeled 75W90 and GL5. And you can use any other standard gear oil, keeping the measures in mind.
You can pick other grades if you don’t get an exact 2011 Subaru Forester front differential oil type. But you must get it from some renowned brands with the abovementioned ratings.
Best 75W-90; GL 5 Gear Oil For Subaru
Let’s get a list of the Subaru recommended diff fluids. It’ll meet the need for a 2013 Subaru forester differential fluid type.
- Valvoline SAE 75w-90 Gear Oil
- TriboDyn 75w90 Synthetic Gear Oil
- Lucas Oil 75W-90 Differential and Transmission Oil
Here are some experts' recommendations if you can't access any Subaru-suggested front diff fluids. You can pick anyone from the below alternatives:
- ACDelco SAE 75W-90 Dexron Gear Oil
- Red Line SAE 75W-90 Full Synthetic Gear Oil
- AMALIE Elixir 75W-90 Full Synthetic Gear Oil
- Royal Purple Set of 3 Max 75W-90 Gear Oil
- Motul SAE 75W-90 Full Synthetic Gear Oil
What Are The Symptoms & Reasons Of Low Differential Fluid?
Grinding or humming noise, loss of grip, overheating, etc., are common lower diff fluid level symptoms. They create various Subaru front differential problems. We’ve got all the typical symptoms with their possible reasons.
Let’s take a quick look at the below table:
| Symptoms | Reasons |
| Damaged Traction | Poor lubrication |
| Irregular noises | Poor lubrication |
| Overheating | Increased friction that generates heat |
| Transmission slippage | Poor lubrication |
| Burning smell | Inadequate lubrication/low-grade diff fluid |
| Unnecessary vibrations | Subpar differential fluid |
| Irregular tire damage | Overload/bent axles/misaligned wheels |
What Is A Differential Fluid Replacement Cost?
When the current fluid becomes aged and contaminated, you need to replace it with the new one. The mechanic will remove the differential cover and put in a new one if the vehicle doesn’t have any drain plug.
It indicates that the diff fluid replacement may include related maintenance. What’s the Subaru front differential replacement cost? The total cost can be between $70 to $150 without repairing any other issues. The fluid will cost around $80; another amount will go for the labor.
But the cost may vary depending on the car model and location. Besides, if you do the Subaru front differential replacement yourself, it’ll save you some bucks. Yes, you can do it easily if you have some practical knowledge and tools to perform this task.
How To Replace The Differential Fluid
We’ve told you above that you can replace the differential fluid yourself. For example, we’ll show you some steps to help you accomplish the job effortlessly for a 2015 Subaru Legacy differential fluid change.
Before entering the process, read the owner’s manual to ensure the grade and quantity of fluid your vehicle requires. Here are the steps to follow:
- First, be sure that the fluid level is lower, so check it.
- The differential has a cover; remove it. Otherwise, there is a plug; pull it.
- Drain the old fluid and refill the reservoir with the correct amount.
- Replace the old gasket if needed, but it’s recommended.
- Perform a test drive to ensure there is no leak.
Frequently Asked Questions – FAQs
What’s The Recommended Fluid Type For The Subaru Front Differential?
The manufacturer recommends using the synthetic grade 75W-90 API GL-5 for a 2006 Subaru Legacy differential fluid or any other Subaru front diff fluid. You can use the standard gear oil that comes with the said specifications.
What’s The Subaru Outback Differential Oil Change Interval?
Experts suggest replacing diff oil between 15,000 and 30,000 miles. It can vary depending on the driving frequency and driving conditions.
Is The API GL5 Full Synthetic Fluid?
Yes, GL5 is an entirely synthetic fluid type similar to available synthetic lubricants. As it comes from petroleum and synthetic bases, it’s safer for the differentials to get smoother outputs.
What Is Subaru’s Front Differential Fluid Capacity?
Subaru front differential fluid capacity is 1.8 liters, equivalent to 2.5 pits and 1.9 US liquid quarts. Knowing the fluid capacity becomes evident when you get various symptoms of lower fluid levels. For example, if you need to replace a 2009 Subaru Outback differential fluid, you must get 1.9 quarts or 1.8 liters of compatible diff oil.
Could I Drive My Car With a Low Level Of The Differential Fluid?
Yes, you can drive your car with warning signs of low differential fluid. However, you must avoid doing this as it’s not recommended. Driving a car without differential fluid impacts the entire vehicle and driving experience.
The Bottom Line
We’ve explained the Subaru front differential fluid type with many related topics. They should clear everything regarding the front differential fluid type with the symptoms, cost, and replacement steps.
As you’ve got enough information about the differential fluid, it’ll help you decide and choose the exact type of diff fluid when you need to change them. Anytime you get any of the abovesaid symptoms of bad/low diff fluid, never underrate them. Responding in time will save a lot.
Similarly, using the recommended diff fluid type – a 75W-90 rating and a GL-5 marking – is crucial to get the expected results from the front differentials. Otherwise, you’ll face a hefty penalty.