We consider a gearbox fluid to be a worthy investment in the long run. In the following post, we will help you to select the best gearbox fluids.

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Our Top Picks:

Best Overall: Buy: Red Line Gearbox Fluid READ REVIEW

Best For Good Quality: Buy: Valvoline Gearbox Fluid READ REVIEW

Best For Peace Of Mind: Buy: Castrol Gearbox Fluid READ REVIEW

Best With Fast Shipping: Buy: Lucas Gearbox Fluid READ REVIEW

Best For Hot Weather: Buy: Lubegard Gearbox Fluid READ REVIEW

Best For Worth The Money: Buy: Slippery Pete Gearbox Fluid READ REVIEW

Best For Heavy Duty: Buy: Motul Gearbox Fluid READ REVIEW

Best With Product Description: Buy: Blau Gearbox Fluid READ REVIEW

Best With Part Number: Buy: Ravenol Gearbox Fluid READ REVIEW

Best For Power Steering: Buy: Joyfans Gearbox Fluid READ REVIEW

Best Overall: Red Line Gearbox Fluid

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The Red Line Gearbox Fluid's high-end materials makes sure that it ages well with use. The red line gearbox fluid is best for great results and it is prior. Make sure this fits by entering your model number. These fluids provide a much lower viscosity at cold temperatures for quicker shifting and their balanced frictional characteristics provide smooth and consistent shifts over extended drain intervals.

Lastly, the red line gearbox fluid provides excellent low temperature shiftability.

Almost all buyers found that the fluid is great with over 100k miles on it. Also, a few strongly agree that the fluid can be used in toyota highlander power steering and works great. Moreover, they say that the manual said the fluid should last 100, 000 miles.

• Country of origin : United States.
• This fluid will make this next re - build transmission last many miles.
• This is fully synthetic, not a blend like some others.
• This can be used in a zf6hp28 fitted to a jaguar str.

Best For Good Quality: Valvoline Gearbox Fluid

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The Valvoline Gearbox Fluid is capable of outshining several other fluids featured in this list in overall features for the price point. The valvoline gearbox fluid has 140k miles and it is brand new. The Manufacturer says: From our flagship motor oils to antifreeze and gear oil, valvoline offers a full range of engine lubricants and cleaners to help keep your vehicle on the road and running at peak performance. Further, this is made for good stuff and it allows for many more applications.

Most importantly, the valvoline gearbox fluid is because of this legacy that people have trusted valvoline products in their vehicles from the model to today's newest models.

Almost all customers opine that the fluid works in mitsubishi lancer invecs ii transmission and power steering. Moreover, they say that the fluid works in about any car or light truck. Moreover, a few strongly agree that the fluid features advanced additives to help extend transmission life. In conclusion, the tone of buyers is very positive and we believe that the fluid suits the purpose.

• This maintains smooth shifting longer than conventional automatic transmission fluids.
• This is supposed to clean out the fuel injectors.
• This fits" anything gm and also takes almost one extra qrt.
• This is synthetic fluid with seal conditioners.

Best For Peace Of Mind: Castrol Gearbox Fluid

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The Castrol Gearbox Fluid's material feels more premium than its price would suggest. The castrol gearbox fluid is used the best, has changed the filter and it works like a charm. Castrol transmax dex/merc multi-vehicle transmission fluid is for use in transmissions and power steering of older ford and general motors vehicles and any other vehicle where the specifications for this product are recommended. And, this meets or exceeds, is designed for a great price and it has 140k miles.

The fluid has reduced shutter, is reliable and it allows for a great deal. In addition, it works perfectly and it shifts well. Finally, the castrol gearbox fluid dropped the pan, is great for a great price from amazon and it smoothed out shifts.

Almost all customers opine that the fluid will take a special kind of fluid. Further, a few strongly agree that the fluid can be used as a universal type of fluid. And, they say that this fluid is designed for most domestic ( American ) vehicles. Overall, many buyers have used the castrol gearbox fluid for more than a few months without any complaints, and it shows no sign of giving up.

• This is a replacement for Dextron 3 for gm cars.
• This does multi vehicle dextron and mercon.
• This is a huge pain in the neck to get it dead on.
• Enhanced friction durability for smooth transmission performance.

Best With Fast Shipping: Lucas Gearbox Fluid

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Compared with other fluids in this category, the Lucas Gearbox Fluid has a convenient design. The Lucas gearbox fluid can do for customer service and it would be perfect for fast shipping. Make sure this fits by entering your model number. Further, this is effective and it works as advertised.

Most importantly, the lucas gearboxfluid changed the filter, dropped the pan and it is very impressive.

Most buyers found that the fluid is perfect as it should be, yet it is 80% better than it was before. In addition, they strongly agree that the fluid is shifting hard and late into gears.. but now, shifts into gears pretty smoothly. And, they also found that the fluid is more noticeable after the vehicle warms up and at low rpm's.

• This is running smoother, no shifting hesitations, it felt like new.
• This is made for good stuff and it is good in some cases.
• This comes with Amazon prime and it is predictable.
• This is great for manual transmissions too.

Best For Hot Weather: Lubegard Gearbox Fluid

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Compared with other fluids in this category, the Lubegard Gearbox Fluid has a convenient design. The lubegard gearbox fluid is effective and it has added 1 oz. Lxe gives automatic transmission fluid the extra lubricity needed for the transmission’s unique frictional equirements. This unique product restores additive content of an old atf and also enhances a new one, resulting in improved performance and smoother, more consistent shifting.

The fluid is formulated with proprietary liquid wax esters (lxe) that are unique because of their natural lubricity, high viscosity index, and high flash points. Most importantly, the lubegard gearbox fluid improves efficiency and life of the transmission for the average.

Most buyers quickly discovered that the fluid makes bold claims plus does the job, thanks to Stoney Floyd. And, they strongly agree that the fluid is a gorgeous car and drives like a luxury car should. To sum up, many have used the fluid for more than a few months without any complaints, and it shows no sign of giving up.

• This dropped the pan, does the job, It is scientific and has an excellent design.
• This comes with directions for use and it is great for real deal.
• It is great to add to the transmission for added protection.
• Only product that increases the fluid’s ability to transfer heat.

Best For Worth The Money: Slippery Pete Gearbox Fluid

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The Slippery Pete Gearbox Fluid is satisfactory and appropriate and fits well with your regular use. The slippery pete gearbox fluid will fit red - lined gallon bottles. And even if you bought a 4cc quart bottle pump, have you found that the end of the hose connected to the pump's outlet will not stay in the gear case's fill hole. And, it works as advertised, and it is perfect for a great tool.

The fluid will also fit agl, toyota atm, amsoil and castrol edge wide mouth quart bottles. Also, the fluid is perfect fit and it is very easy. Most importantly, the slippery pete gearbox fluid is white, works as expected and it works great.

Most buyers opine that the fluid comes in a big zip - lock bag which is great to keep it in. Also, a few say that the fluid is a must-have tool for any garage. Moreover, they say that the fluid is good flow of heavy - grade gear oil. In conclusion, the tone of buyers is very positive and we believe that the fluid suits the purpose.

• This works perfectly and it works very well.
• This has made handling these liquids much easier and safer.
• This is perfect for the gallon jugs of transmission oil.
• This is made for a 4 gallon container of 85.

Best For Heavy Duty: Motul Gearbox Fluid

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If you want nothing but a fluid that is reliable, this Motul Gearbox Fluid is certainly a wise investment. This product can expose you to chemicals which are [are] known to the state of California to cause cancer and birth defects or other reproductive harm. And, the fluid is ideal for extreme conditions. In short, with a 5.0 rating and more than 992 buyers, the motul gearboxfluid stands as the best choice.

Most buyers agree that the fluid works well in 2019 crosstrek 6mt. Further, they strongly agree that this fluid, possibly because Subaru no longer offers extra - s transmission fluid. Overall, at the price, they believe that they got a steal of a deal with it.

• Less effort is required on the gear lever to shift the gears.
• 0 percent share loss : unshearable oil film in extreme conditions.
• 100 percent synthetic extreme pressure lubricant for an efficient anti-wear protection.

Best With Product Description: Blau Gearbox Fluid

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The Blau Gearbox Fluid is capable of outshining several other fluids featured in this list in overall features for the price point. Confirm this product fits your vehicle 's make, model, and transmission. Moreover, the fluid improves transmission performance, efficiency, reduces wear and extends transmission life. In short, with a 4.7 rating and more than 120 buyers, the blau gearbox fluid stands as the best choice.

"Poke or drill a hole in your bottles while inverted. " - says, one customer. To sum up, at the price, they believe that they got a steal of a deal with it.

• Before ordering, read important application or fitment notes in the product details section below.
• New and hot releases.

Best With Part Number: Ravenol Gearbox Fluid

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The Ravenol gearbox fluid is satisfactory and appropriate and fits well with your regular use. Also, it is designed for corrosion resistance, It works with part numbers and has an excellent design. Race track proven fluid right out of the bottle for your vehicle. Lastly, the Ravenol Gearbox Fluid provides excellent lubricating ability and transmission function even at extreme low winter temperatures along with providing an extremely low pore point.

In conclusion, most customers found the fluid is functionally comfortable and no one questions it.

• Lot of satisfied buyers.
• New and hot releases.

Best For Power Steering: Joyfans Gearbox Fluid

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Compared with other fluids in this category, the Joyfans Gearbox Fluid has a convenient design. The joyfan gearbox fluid is easy to use and it is easy to carry. Make sure this fits by entering your model number. The amount of extracted oil should be controlled within a certain range to prevent leakage and overflow.

The fluid is compatible with Altis 2010 benz 722.9. And, this features an on / off 90 degree rotation. Most importantly, the joyfan gearbox fluid packed well and it is good for corrosion resistance.

• This has taken durable construction.
• This is suitable for a one-person refilling job.
• It has clear volume and it is easy to connect.
• This is used to drain old fluid.