Best Manual Transmission Fluid


Best Manual Transmission Fluid: You Should Know Everything

With anti-wear and scoring properties, transmission fluid comes. Also, the best manual transmission fluid has a better power to thermal oxidation. This oil is a mixture of additives and base oil. However, it is a mixture of heavyweight hypoid gear, regular engine oil, and even automatic transmission fluid.

Ask your owners to know what oil is best for your manual transmission. Even, it has a problematic cocktail to rectify traction and extreme fluctuations in temperatures.

Transmission inside has steel, but relatively there are also minimal brass indicators. As a result, transmission liquid works without differentiation well with the requirements of both pressures.

Nevertheless, this is the article where we are trying to tell you about the best manual transmission fluid. So to know more about transmission fluid, keep reading this article.



About Of Manual Transmission Fluid:


Well, manual transmission fluid is the liquid applied for cooling and lubricating a manual transmission. Therefore, for your car, transmission fluid is essential, and it plays a significant role. Moreover, regularly you should top up this transmission fluid.

Usually, the manual transmission has bearings, internal gears, and synchronizers that allow the driver to change gears. Most of the manual transmission is greased with massive petroleum-based oil.

In an older vehicle, manual transmission fluid is sometimes defined as manual transmission oil or lube, typical for older cars.


Which Fluid Is Best For Manual Transmission?


Suppose you run a stuck transfer; it’s necessary to use transmission fluid to keep your transmission cool and run smoothly. As a result of using this fluid, and enjoy the unique and simple gear changes feel.

Like another lubricant, this fluid also has been polluted and needs changes eventually. You can pick up any supplied product but to save money, choosing the excellent performance brand fluid is essential. From here, you can also learn about some brands of transmission fluid.



Types Of Manual Transmission Fluid:

On the other hand, transmission fluid gives lubrication for complex gears and vehicle transmission moving parts. At first, transmission fluid was petroleum-based, but in 1972, with synthetic transmission fluid, this fluid increasingly became famous.

It’s because synthetic transmission fluid does not lose coating capacity and viscosity quickly. Mainly, this fluid can adequately transfer the Heat for a long time.

Automatic and manual transmission needs proper transmission fluid with exceptional thickness and performance. Because suitable transmission fluid can reduce wear and increase stability on the moving parts. Usually, you can find two types of transmission fluid. So, there are:


  1. Traditional Manual Transmission Fluid
  2. Synthetic Manual Transmission Fluid




1.Traditional Manual Transmission Fluid:

Well, from regular engine oil to heavy gear oil, you can use many transmission fluids. If you want you can also use the automatic transmission fluid that some manufacturers suggest. All of the requirements on your vehicle, driving type, engineering, and others pressure that you usually do.

The biggest problem in manual transmission is fluid pollution either because of friction between the moving parts. This contaminates fluid shear metal parts into the transmission fluid.

That’s why changing the manual transmission fluid more frequently is vital than automatic transmissions. The lubricating ability and viscosity of transmission fluid are decreasing day by day.


2. Synthetic Manual Transmission Fluid:


The fluid is a synthetic transmission fluid generated from refined oils that come with various chemical additives. First, this type of oil comes from group IV oil and a PAO recognized by the American Petroleum Institute (API).

Second, non-PAO synthetics come from diesters, alklylsted napyhenes, polyesters, alkylated benzenes, and API, classified as Group V oils. Specifically, other synthetic transmission fluids use feedstock and a catalytic turning process to generate hydro isomerized oils classified by API.

Synthetic transmission fluids have been shown to keep their viscosity longer than traditional transmission fluids. For that reason, these fluids don’t need to change more frequently.



You Should Consider When Choosing Manual Transmission Fluid:


Undoubtedly, there is a golden rule, and that is you should always pick your suggested vehicle’s transmission fluid. However, that’s not mean you always have to pick a specific brand. You need to notice two figures when choosing transmission fluid: GL number and SAE weight.

SAE weight indicates the viscosity of oil, which means how thick it is. Regardless, you can see SAE 20W50 — W indicates winter because oils are thicker when they’re cold. In addition, manual transmission fluid summer weight is 20, and winter weight is 50.

Indeed, the number of GL is a system developed by the API. Moreover, it indicates how the transmission fluid reacts with different metals utilized in the gearbox.

Therefore, it runs from GL-1 to GL-5, but not GL-4 because GL-4 is more usable. Please, don’t think the GL number refers to progressively better fluids. GL-2 is different from GL-1, and GL-1 is good from GL-2.




From $12 manual transmission price starts. Accordingly, the brand of OEM fluids can increase as high as $30 quart. Remember that, for a fundamental change, you need 9-12 quarts.

Applying these figures, the difference between premium brand and budget could be $216. So, you can shop around this budget.


Manual Transmission Oil Cooler:

Consequently, a transmission oil cooler helps to prevent leaks and to overheat transmission fluid. Plus, a manual transmission oil cooler also protects your transmission from likely expensive damage. Therefore, while replacing the transmission, you should replace this oil cooler.

  • Robust aluminum construction so that it provides long-lasting performance.
  • Direct replacement system for always proper fit.
  • Accurate quality control measures to ensure product standards.


Transmission Oil Pan:


Transmission needs ATF to provide significant oil pressure, cooling capacities, and lubrication. Other jobs include preventing rust, cleaning metal surfaces, preventing oil oxidation, conditioning gaskets, and enlarging the temperature range.

Averagely automatic transmission includes up to 12 quarts of transmission fluid. On the other hand, more powerful cars have transmissions that contain up to 36 quarts. In contrast, a transmission oil pan can contain about half of the total quantity of fluid.

As you can imagine, transmissions need more ATF, which means to handle the engine power of vehicles; this transmission works harder. Furthermore, more ATF-contained transmission provides the extra cooling ability.


The Common problems Of Transmission Oil pans:


We know automatic and transmissions have a fair share of problems; pans are no exception. In addition, it seems a transmission oil pan is too easy to develop the problems, but they actually do. The common problem that happens with transmission pans include:

  • Big substance can hit the transmission oil pan and probably creates a puncher leaking from ATF. A large hole is the cause of losing an enormous amount of fluid in a small quantity of time. As a result, you can see very inconsistent transmission behavior.
  • Also, the transmission pan gaskets will slip or crack from age that can cause oil to leak out.
  • Loose pan drain and bolts plugs can cause a leak.
  • Utilizing a floor jack to pick a car by the pan can reason a significant dent for that reason in decreased oil strength.


80w90 Gear Oil:


80W-90 gear oil is commercial extra-high performance gear created from specific base oils and a progressed additive system. These gear oils come for heavy-duty commercial transmissions and final drives because of shock loading and extreme pressures.

Plus, at high bulk oil temperatures, this gear oil provides thermal power, excellent chemicals, and excellent performance at low temperatures.

Besides this, it comes with a demonstrated excellent tarnish protection resulting in wet conditions and water contamination. Especially recommended for use these oils in by ExxonMobil:



Applications Of 80w90 Gear Oil:


  • Good for heavy-duty manual transmission
  • On-highway heavy-duty and light buses, trucks, cars, and vans.
  • On industries, including mining, quarrying, construction, and agriculture.
  • Other heavy-duty automotive and industrial applications, including high-speed load, high and low-speed conditions.


Important Note:

Notably, for API GL-4 level performance, these lubricants are not suitable. For example, there are not for transmissions, which need automatic transmission fluids and engine oil.

Please, follow your owner’s handbook for which OEM application needs for your equipment or cars.

Benefits of 80w90 Gear Oil:

Today’s heavy gadgets applications on drive train lubricants demand higher performance. Higher torque, higher speeds, and heavier loads need improving formulations to optimize operating expenses and maximize tool life.

Likewise, long service intervals have extra demands on the gear oil. So, the key advantage and benefits are:


  • Expanded bearing and gear life due to minimal deposits and bigger seal life.
  • Decreased operating fees and enhanced load carrying capacity.
  • Avoid wear and bigger elements in life.
  • Reduced gear lubricants number to minimize misapplication and simplify inventory.
  • Protects film power for valuable lubrication.


SAE 85w140 Gear Oil:


SAE 85W140 comes in using a mix of highly hydrocracked, high-quality Group II, high viscosity index, and more. In addition, 85w140 gear oil mixed with extreme pressure non-lead additives provides excellent oxidative durability, seal compatibility, and bearing friction security. Furthermore, this oil provides anti-foam characteristics.

Without a doubt, SAE 85w140 exceeds the necessity of some vehicle, transmission, and gear manufacturers. If you want, you can use these gear oil off-highway and heavy-duty applications and passenger cars.

Don’t mix this SAE 85w140 gear oil with lead-based gear oils. In particular, this oil is ideal for limited-slip, spiral or gears, manual steering gears, manual transmission, and more.



Benefits of SAE 85w140 Gear Oil:


  • High-grade teeth wear protection.
  • Exceptional bearing breakdown protection
  • Great seal compatibility
  • Excellent oxidative and thermal strength for the operation of high-temperature
  • Super anti-foam properties.


Total Transmission Oil Transtec:


Total transmission oil transtec especially comes for all gearbox lubrication and axles. Transtec also requires API GL-5 level and a thickness of SAE 80W-90, 85W-140.

A high thickness index gives good lubrication and also allows simple gear changes at high and low temperatures. Mainly, Total transtec also has high extreme pressure characteristics.


Benefits of Total transmission Oil Transtec:


Transmission oil cooler comes from quality-engineered to cool transmission fluid automatically and expanding its life. Well, Total transmission oil transtec provides many benefits for the customers. Here are the following features and benefits:


  • Superior power in service
  • Significant wear avoiding properties, anti-rust properties, and high-oxidation friction
  • Contributes to improve drivability and protect mechanical parts.
  • Covered for high bre
    akdown friction and enhanced security against components.


You need to check the car’s maintenance guide while using these products. When you are going to change the oil, you should take care of the manufacturer’s recommendations. Don’t store this product at temperatures over 60°C.

Never put this product at the near cold, sunlight, and extreme temperatures functions. Otherwise, you should lay this drum horizontally to avoid any pollution from water and protect the product level.



Other Best Manual Transmission Oil In 2021:


Are you looking for the best manual transmission fluid? Applying the proper fluid can keep your transmission running smoothly. That’s why you have to choose the best manual transmission for your vehicle and engine.

Alike, manual transmission fluid is the lubricant that helps to lubricate your manual transmission. Subsequently, this oil can keep substances smoothly running and protect the gears from rubbing and grinding. Also, as a coolant, this fluid acts, and in the transmission, it can reduce high temperature.

Choosing the best manual transmission fluid is not easy, but from here, you can get the best fluid for your vehicles. However, here below, we will describe the top brands of transmission fluids. Keep reading attentively:


1. Valvoline 80w90:


Valvoline 80w90 gear oil is a high-performance extreme pressure gear lubricant. 80w90 gear oil protects shock loads, extreme temperature and high-speed corrosion, horsepower conditions, and more.

This high-quality lubricant also helps to keep your automobile running in excellent condition. Subsequently, it also can prevent loss of breakdown safety.


Benefits Of Product:


  • Protects from extreme temperatures.
  • Created with severe pressure additives.
  • It helps gears to protect from scouring, corrosion, scuffing, and pitting.
  • Suitable for traditional hypoid differentials and manual transmissions in light trucks, heavy-duty trucks, and passenger cars with an API GL-5 or GL-4 fluid.
  • Fully synthetic gear oil for short slip differentials.



2.Amsoil 80w90:


Amsoil 80w90 is a multifunctional lubricant designed to exceed automotive applications and equipment requirements, calling for a viscosity grade of an SAE 80w. Indeed, this oil comes with high-quality additives and without wax synthetic oil, preventing thermal breakdown.

In addition, the high viscosity index improves viscosity retention and film strength. In fact, Amsoil also provides excellent protection for bearings and gears, withstand Heat, and help to expand equipment life.




  • High-load bearing and gear protection.
  • Long tool and oil life
  • Helps to decrease maintenance costs
  • Compatible with synthetic and traditional oil.
  • Expanded features for several applications.



3.80W90 Amsoil Synthetic Oil:


Certainly, 80w90 Amsoil is synthetic gear oil and is best to use in various types of applications. You can use this lube in heavy duty and light, industrial or commercial, and automotive applications.

It replaces traditional 80w90 gear oil and comes to perform rear and front differentials and manual transmissions. When you want, you can use this oil in the rear axles where GL-4 lubricant is best.

Point To Be Noted: 80W90 Amsoil synthetic oil does not support extended drain intervals with water contamination. Therefore, check the gear oil frequently if you think there is water contamination.

Also, gear lube has to be changed more frequently if operating systems and equipment are in dirty conditions.


4.Mobilubehd Plus 80w-90:


Mobilube HD plus gear oil is a high-performance gear oil prepared from an advanced additive system and selected base oils. In other words, this oil is suitable for performance in heavy-duty commercial transmissions, final drives; extreme pressures are standard.

Without a doubt, this gear oil gives outstanding thermal and chemical durability at high-bulk oil temperatures and the best performance at low temperatures.

Importantly, this oil also has demonstrated oxidation protection that can come from wet conditions and water pollution. HD plus Mobilube gear oil shares typical formulations with 80W90 and 80w-140 gear oils.




  • On-highway heavy-duty and light trucks, cars, and buses.
  • Off-highway factories, including mining, agriculture, quarrying, and construction.
  • Other automotive and heavy-duty industrial applications, including hypoid and more gear operating under situations where high-speed and low-speed conditions appear.
  • In semi automatic or manual transmissions, top-off, initial fill, and refill closed retail gearing, including final drives and drive axles.



Important Note:

Never use this lubricant in API

GL-4 level performance applications. They are not purposes in transmissions

Which automatic transmission oil and engine oil is suitable? Before using this

Oil, find, and read your owner manual to know your vehicle’s OEM applications.


Benefits And Features:


Recent heavy tool applications place more extended performance needs on drive train oil. Heavier loads, higher torque, and higher speeds need exceptional formulations to optimize operating costs and maximize tool life. The essential benefits and features include:




  • Outstanding thermal power and friction to high-temperature oxidation.
  • Exceptional protection against high torque wear.
  • Great erosion and rust security.
  • Valuable low-temperature lubrication.
  • Board multipurpose ability.


Benefits And Advantages:


  • Decreased operating expenses
  • < li>Reduced wear and equipment life

  • Enlarged bearing and gear life
  • Comfortably startup
  • Decreased leakage and pollution.


5.Mobil 80w90:


Mobil 80w 90 gear oil is especially coming for cars. To know lubricant properties, you should follow the material manufacturer’s recommendations.

Extreme-pressure and heavy-duty lubricants are ideal for tools operated around high-speed, low torque, and low-speed high torque conditions.


6.Lucas Gear Oil 85w140:


Any gear oils have required development for years, particularly in the high-performance industry. In making the “Lucas heavy-duty lubricant stabilizer, Lucas 85w-140 gear oils enjoy this technology. In heavy industry, this oil is suitable.

Most importantly, this formula is fortified with lubricity and anti-wear agents to control drag and wear and additives to control Heat. Only you can get these features in Lucas gear oil; ordinary gear oil did not contain these special features.

Therefore, Lucas gear oil is excellent for heavy-duty applications and race cars, where plain gear oil isn’t enough.


Key Benefits:


  • Outstanding for heavy-duty and high-performance applications.
  • Includes special anti-wear agents and lubricity agents.
  • Supports to control Heat 85w140 vs. 80w90:

85W140 and 80W90 have come with premium attributes with valuable characteristics. Both oils are dependable in heavy use that offers perfect durability.

So then, what’s their difference? For customers, this question is fundamental. Comparing can relax the process of selection and put all questions to sleep.



Table Of 85w140 vs. 80w90:


Comparison can help overlook these two product differences and similarities. We are trying to make a complete table with their features. Specifically, this table can help the customers to make a perfect decision.

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Which Gear Oil Is Thicker 85w140 or 80w90?


Look at the names; the concept is clear that 85w140 is thicker in room temperature and application temperature. The 85w140 is quite thick, but 80w90 oil achieves this round easily. The viscosity of oils measured from 10 t0 140, so it’s clear that 85w140 is thicker.


SAE 85w140 Gear Oil:


SAE 85w140 gear oil comes to help the requirements of lubrication of the gear trains, type of limited-slip configurations, and extreme-pressure lubricant. Gear oil 85w140 comes from selected additives and quality base oil.

That’s why it can provide anti-wear protection in heavy loads, avoid rust and corrosion even when the system is useless. Unique inhibitors also exist, which limit at high operating temperatures deposit formation and oil oxidation.

For providing excellent protection, this oil comes in two multi-grades and monograde. Without using the modifier additives of viscosity, you can ensure 85w140 gear oil viscosity capacity and reduced gear wear.





  • Extreme protection
  • Ensure gear oil viscosity capacity
  • Superior thermal durability
  • Maintains cleanliness & reduces gear wear
  • Longer drain intervals


Penrite 85w140:

Mineral-based gear oil is a Pentire 85w140 gear oil suitable for short, traditional, and slip style differentials. That requiresMT-1 and API GL-5/6 designation liquids.

Penrite comes with extreme pressure additives to deliver extreme oil film power for increased safeties. In addition, gear oil of 85w140 is also suitable for utilizing heavy-duty applications that carry heavy loads and great shock.

All mineral premium base oils deliver excellent thermal power while maintaining cleanliness and decreasing extending depth wear oil drain. Further, Pentire 85w140 also includes the proper limslip additive without additional additives to use slight slip differentials.



Severe pressure additives that provide enhanced film capacity for excellent wear security.

  • The technology of premium minerals provides incredible thermal power to maintain cleanliness and enlarge service life.
  • It comes with the required limslip additive for applying in slight slip without any additional additives.
  • Includes anti-shudder additives for sleek protection.


Harley 6 Speed Transmission Oil Capacity:


The capacity of Harley 6 speed transmission oil is 3-quarts. The twin Cam 96 is smooth, reliable, and robust with innovative design incensement and large displacement. Lower cruising rpm’s express into extra ease on long drives.

Don’t overfill the transmission, and you should be careful. The new design of camshafts comes with a multi-piece assembled to replace counterfeit Twin Cam 88. On the dipstick, the level of transmission oil is correct between Add and Full marks.

6-speed Twin Cam 96 cruise Drive transmission is quieter and needs little maintenance from 5-speed previous transmission.

Apply a machinery jack for safety. By H-D Motor Company, 20w-50 oil may use in Engine, Primary Case, and Transmission in these three places.

On the other hand, Harley transmission suggests utilizing heavier 75w-90 gear lube. Both techniques exceed API specifications and the manufacturers and will not cancel any warranty. Ideally, its shift points are matched with the output of engine performance.


Polaris Transmission Oil:

Really when high-performance counts, Polaris transmission oil provides traction to keep your gadgets strong and going like new.

Be safe with Polaris in a straightforward way by applying maxima inside. Polaris transmission oil is a gear case oil and high transmission oil for utilization in modern vehicles.




  • Comes for use in straight-cut transmission and gear cases and not for hypoid-type gear cases.
  • Specific additive system provides ideal resistance performance for transmissions.
  • Perfectly used in transmission systems and moist back brake.
  • Decreases drag of fluid and increases strength while expanding bearing life and gear.
  • Improved anti-wear and severe pressure agents provide incomparable safety for heavily loaded gears.
  • Completely produced to help against foam, wear, corrosion and rust for expanded periods.



Subaru Manual Transmission Oil:

Well, with a manual transmission, if you drive a Subaru, you may think you will never need to exchange a transmission fluid. But the case is not like that.

So, the complicated mechanism is a gearbox, and it needs accurate lubrication to prevent damage and wear. Subaru gear oil protects these components.

Like another fluid, these Subaru oils will also break down after a while and change for outstanding performance. A guideline of Subaru suggests an extreme service interval of 30 months or 30k miles, which comes first.

After driving your car in dusty or dirty conditions, you want to take this service to keep everything healthy.

Why Should Manual Transmission Gear Oil In Subaru Change?


Typically, the simple truth is that the inside of the manual gearbox has lots of metal-to-metal contacts. Unfortunately, if that equipment isn’t correctly protected, critical damage could happen.

Additionally, a long time after, inside Subaru gearbox gear oil can break down and won’t save critical moving parts.


VW Manual Transmission Oil:


VW manual transmission oil is a base of multipurpose semi-synthetic oil. Therefore, this oil is ideal for heavy-duty manual transmission. Evidently, this transmission oil comes from high-quality synthetic oil with a unique additive treatment.

Also, it comes for reducing manual transmission, increasing stress and has a trouble-free transmission function. Therefore, SAE 75w-90 manual transmission oil is ideal for heavy stress manual transmissions, car steering gearboxes, and transfer cases.



Technical Characteristics:


75W-90 SAE VW Manual Transmission Oil Offers:

  • Additional high-pressure suction properties
  • Great ageing friction
  • Good viscosity temperatures properties
  • Incredible low-temperature properties
  • Shearing ability
  • A durable lubricating film under high stress
  • Low pour point
  • Fantastic Electrometric consistency to avoid a leak.


Final Words:


The best manual transmission fluid comes with good stability to protect your manual transmission. Consequently, in transmission, fluid load-carrying and anti-wear components ensure gear protection and long synchronizer life.

Overall, for manual transmission, this fluid is most optimal. However, before using any manual transmission fluid for your vehicle, check your owner’s manual to lubricate your vehicle correctly.

In fact, from our article, you can choose the best fluid for your manual transmission. Above we are trying to suggest some best products and details of manual transmission fluid for you.

We hope our article can help you decide what is best and which is suitable for your cars. Thanks for staying with us.







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