Best Transmission Fluid Additives in 2026

CUTTING EDGE TECHNOLOGY - Shockproof technology designed to make a big impact against big impacts

QUIET SMOOTH SHIFTING - V-Twin Transmission oil dampens transmission noise, reducing the notorious shifting clunk found in these gearboxes

IMPROVES PERFORMANCE - Transmission fluid that dramatically reduces temperature, providing thicker oil films between gear teeth and resists throw-off

MTL has been significantly improved with new technologically advanced additive systems that drastically improve clutch life and reduce slippage

Mobil 1 Synthetic LV ATF HP is a high performance synthetic automatic transmission fluid that delivers extended transmission life with improved thermal stability

Has outstanding long-term frictional properties to help improve and extend transmission efficiency, smooth shifting performance, and fuel economy

Exceptional thermal and oxidation stability keep transmissions clean to help provide outstanding performance even under severe driving conditions

Formulated specifically for synchromesh transmissions, resulting in excellent synchronizer performance.Fit Type: Vehicle Specific

Minimizes sludge and varnish deposits to provide for a cleaner transmission

Protects against surface distress, minimizing spalling, pitting, rust, corrosion, and overall wear

Provides excellent performance in electronically controlled automatic transmissions. Dyed red for easy leak detection

Manufactured with high-viscosity index, premium-quality, hydroprocessed base oils and specially designed performance additives. Helps prevent rust and corrosion

Provides excellent shifting characteristics at high and low ambient temperatures, and guards against transmission shudder

For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.

Outstanding viscosity/temperature characteristics, optimal protection against foaming

Extremely good low temperature properties

Trusted formulations that surpass all major Dual Clutch (DCT) OEM requirements; compatible with all DCT transmissions including the German DSG for VW/Audi, Mercedes Benz, Porsche, BMW; exceeds requirements for and is compatible with very advanced Ferrari, Bugatti transmissions

Specifically formulated for and compatible with use in the DPS6 power shift twin dry-clutch transmission requiring Ford WSS-M2C200-D2/ XT-11-QDC specifications; Ford BMW, Audi/VW DSG, Mercedes Benz, and many others

Exceptional gear grip and frictional stability; optimal frictional coefficient and fluidity for super-fast, flawless shifting; exceptionally low gear wear and improved transmission performance across the board

Main Usage: As a connector for car oil pan ATF filling tool;

Compatibility: for VW and for Mini Cooper transmission AISIN 09G, Thread M10 x 1.0;

Material: Aluminium Alloy, Surface anodized;

Idemitsu ATF Type H-Plus is formulated specifically for use in Honda and Acura vehicles where Honda ATF Z-1 or DW-1 fluid is specified.

Optimized viscosity and advanced friction reducing additive technology provide exceptional fuel economy performance.

Excellent resistance to oxidation and thermal breakdown provide longer fluid life.

Fully compatible with all transmissions that require Mopar ATF+, Mopar ATF+2 and Mopar ATF+3

Improved thermal stability for longer fluid life

Improved viscosity stability for consistent transmission operation

Single Quantity

No Core Charge Req.

Weight: 2lbs

Specifically formulated for use in the DPS6 power shift twin dry-clutch transmission

Manufactured with synthetic base oils and performance additives providing improved shifting at all ambient temperatures

Use only in transmissions requiring a fluid meeting WSS-M2C200-D2

Designed specifically for use in metal belt-type Continuously Variable Transmissions including Mini, Nissan and Subaru

Includes anti-wear additives for improved metal-to-metal protection in torque-converter clutches and offers consistent performance over broad temperature range

Synthetic base stocks offer improved shear characteristics, improved thermal stability and extended drain intervals (up to 30,000 miles, follow manufacturers specifications)

Pentosin ATF 44 is primarily intended for use in Aisin AW automatic transmissions, used in a large number of Japanese passenger cars and light duty vehicles, but can also be used in select American and European vehicles

ATF 44 is formulated with the finest commercially available synthetic oil base stocks and additive components, for the ultimate in protection and performance, and is intended for both Asian vehicles and Dexron III applications

Pentosin ATF 44 is compatible with conventional branded transmission fluids but a complete fluid change is recommended when converting to ATF 44 to take full advantage of its superior performance characteristics

MAIN USAG：Transmission Fluid Filling adapter is a connector for 2003 and newer Explorers oil pan ATF filling tool,Required to fill or add fluid to the 5R55W Transmission, A must have tool for every mechanic;

WIDELY USE：5R55W/5R55S transmission fluid fill adapter Replacement Ford 307-437/SST-6604/OTC 6604/CTA 7420,Compatible with most Ford model ,such as 2003 and newer Explorers ;

ADVANTAGE：Not easy to rust or oil corroded,Easy to Connects to most Tanks of ATF Filling System,Such as CTA Tools part #7400 ATF Filling Tank,Barb coupler design prevents the hose from slipping,Save money by not having to get it serviced at the dealer；

【MAIN USAGE】As a connector for car oil pan ATF filling tool. Used in conjunction with the ATF filler system.

【COMPATIBILITY】 The transmission fluid adapter compatible with DSG Audi Automatic Transmissions. Replace part number: VAS6262-1, Thread: M24 x 1.5.

【PREMIUM QUALITY】The transmission fill adapter is made of aluminum alloy materials. Not easy to rust or oil corroded. more secure and stable. The threads can fit the transmission drain perfectly, without any leaking. Meets or exceeds OEM standards.

Formulated for the transmission and primary of Sportster motorcycles and Buell Blast motorcycles

Special friction modifiers allow for optimum shift quality through wide ranges of conditions and over long periods of time

With special low temperature characteristics, this high viscosity index fluid ensures stable operation over a wide temperature range

Protects transmission from corrosion and excessive wear with special anti-wear characteristics

BG ATC Plus enhances properties of both new and used automatic transmission fluid.

It improves fluid oxidation stability, thereby prolonging fluid life and the life of the transmission.

It prevents leaks by conditioning hardened seals-keeping them soft and pliable.

Highest thermal stability

Excellent corrosion protection

Excellent viscosity/temperature properties

Brass

Improved design for better hose grip

Save money by not having to get it serviced at the dealer,A must have tool for everyone

[FUNCTION] Transmission Automatic Fluid Oil Filling Filler Adapter as a thread connector for car oil pan ATF filling tool. Part Number: 722.9, thread M12 x 1.5, replacement for Mercedes Benz Transmission.

[COMPATIBILITY] This Transmission Fluid ATF Fill Adapter compatible with Mercedes Benz 722.9: 2008 ML 550, 2011 GLK350, 2013 ML550, 2014 E350 MB, 2014 ML350, 2015 MB GLK 350 and more.

[HIGH QUALITY] This mercedes transmission fill adapter is made of Aluminium alloy.Made of hardened steel construction, durable and reliable. Design improved for more durability, Stable and updated characteristics, high reliability.

Hot Shot's Secret Blue Diamond Severe Duty 6-Speed Transmission Fluid meets the specifications for any scenario requiring an SAE 50 manual transmission fluid, including heavy-duty, towing or demanding street applications, designed exclusively for the G56 transmission found in Dodge Ram Trucks.

As your vehicle performs applications like navigating challenging terrain and towing heavy loads, fluid starts to break down; Blue Diamond Severe Transmission Fluid slows fluid breakdown by improving your vehicle's oxidation stability

Patented FR3 Nano Lubricity Technology gives your vehicle an extra protective layer to prevent the metal-on-metal contact that causes wear and tear; Blue Diamond Transmission Fluid formula gives you the film strength to go the extra mile

Adrenaline transmission fluid helps reduce extreme heat by improving thermal stability; prevents varnish and sludge deposits to keep the transmission running smoothly

Promotes nonslip shifts for proper acceleration and power from the engine to the wheels

Improves shift response time to prevent delayed engagement

This RV transmission cleaner from Hot Shot's Secret is the only RV additive that can remove stiction in RV transmissions, helping to ensure better operation

The RV transmission protector stops rough shifting and hesitation, providing an overall smoother operating experience for the vehicle

The RV transmission cleaner increases transmission life, so you get longer-term performance from your vehicle and engine

HELPS REDUCE EXTREME HEAT

IMPROVES OXIDATION STABILITY

REDUCES NOISE AND VIBRATION

Helps reduce extreme heat

Promotes non-slip shifts & increases response time

Improves horsepower up to 3% over the leading national brand

Excellent wear resistance

Prevents foam formation

Outstanding friction characteristics

Prolongs fluid life

Prevents deposit formation

Improves fluid stability

[FUNCTION] Transmission Automatic Fluid Oil Filling Filler Adapter as a thread connector for car oil pan ATF filling tool. Reference Part Number: VAS6262-1 VAS6262-2 VAG1924/1 VAS5162-1 722.9.

[PERFECT FIT] 5PCS ATF transmission fluid adapter according to the original factory specifications, brand new (Not Genuine). These oil filler adapters replacement for VW Audi 09G 01J 722.9 CVT DSG ATF Benz 722.9.

[HIGH QUALITY] These transmission fill adapters are made of hardened steel construction, durable and reliable. Direct replacement, perfect fit with no leaks. Each has strict quality control standards to Build and test. Meets OEM standards.