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The 8 Best automotive transmission additives of 2024

Are you trying to find automotive transmission additives among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling automotive transmission additives on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 21 hours of research and did 40 automotive transmission additives tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best automotive transmission additives you can buy today

SaleNo. 1
Lucas Oil 10009 Transmission Fix - 24 Ounce, White
  • The #1 transmission problem solving additive
  • Contains no solvents
  • Can be added to existing fluid without draining any out
  • Effective in an extremely high percentage of cases
  • Extends needed protection to planetary gears
  • Reduces the need for frequent fluid changes, extends fluid life up to 4 times longer
  • A must for motor homes and commercial vehicles
  • Pour one 24 oz. bottle into your existing fluid without the need for draining
  • For larger or heavily worn transmissions, a second bottle may be required
  • In compact or sub-compact vehicles, a 12 oz. bottle is recommended
SaleNo. 2
Hot Shot's Secret Shift Restore Automatic Transmission Additive 16 fl oz Bottle
  • Reduces operating temperatures
  • Eliminates station from all automatic & CVT transmissions
  • Reduces coefficient of friction
  • Shift Restore minimizes metal to metal contact
  • Smooths out gear changes
No. 3
Rislone High Mileage Transmission Stop Slip with Leak Repair, Pack of 1
  • Restores performance
  • Quiets noise
  • Stops leaks
  • Stops slipping and prevents lazy shifting
  • Conditions seals and prevents future leaks
SaleNo. 4
Lubegard 60902 Automatic Transmission Fluid Protectant, 10 oz
  • Fit type: Universal Fit
  • Reduces wear throughout the transmission and optimizes total transmission performance
  • Prevents overheating, reducing elevated operating temperatures - Optimizes total transmission performance
  • Eliminates clutch chatter and torque converter shudder; Softens and modifies harsh shifts making them quicker in duration
SaleNo. 5
BG ATC Plus
  • 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.
  • BG ATC Plus helps control transmission shudder' retards formation of sludge and varnish deposits and prevents foaming.
No. 6
Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack
  • The original transmission shudder fix
  • A concentrated friction modifier formulated specifically for instantly eliminating torque converter lock-up shudder
  • Provides four times less wear than regular ATF
  • For use in any automatic transmission fluid (not for use in Ford Type F or CVT applications)
  • Voted top product by transmission professionals
No. 7
Lubegard 19610 Instant Shudder Fix
  • Instantly eliminates torque converter shudder
  • Provides four times less wear than regular ATF
  • The original transmission shudder fix
  • Voted top product by transmission professionals
No. 8
K&W 402033X6 Trans-X Automatic Transmission Stop Leak & Tune-Up - 32 Fl Oz Leak Repair Solution for Automotive, Power Steering, Hydraulic Systems | Car Care Fluids
  • K&W SEALANTS & SOLUTIONS: From head gaskets and engine blocks to automatic transmissions and power steering, K&W products are made to stop leakage in aging vehicles. Our sealants provide an effective alternative to costly repairs and parts replacements.
  • TRANS-X STOP LEAK & TUNE-UP: Our formula prevents leaks caused by aged seals & gaskets place. Powerful cleaning agents remove sludge, gums, & varnish that helps to prevent premature failure and extends transmission life.
  • APPLICATION RANGE: Trans-X is formulated to repair leaks in automatic transmissions, power steering, & hydraulic systems, and can be used as preventative maintenance when added to transmission fluid. This solution is not compatible with CVT or manual transmissions.
  • SAFE HANDLING: Highly flammable leak repair solution must be stored in a well-ventilated place away from direct heat. Wear appropriate personal protective equipment such as safety glasses and gloves.
  • PRODUCT SPECIFICATIONS: Trans-X Stop Leak & Tune-Up Solution is available with 32 fl oz. fill.
No. 9
K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment - 16 Fl Oz Leak Repair Solution for Automotive, Power Steering, Hydraulic Systems | Car Care Fluids
  • K&W SEALANTS & SOLUTIONS: From head gaskets and engine blocks to automatic transmissions and power steering, K&W products are made to stop leakage in aging vehicles. Our sealants provide an effective alternative to costly repairs and parts replacements.
  • TRANS-X LEAK REPAIR FLUID: Specially developed for vehicles with 75,000 miles or more, this automatic transmission fluid extends the transmission life, stops leaks, repairs leaks, prevents future leaks & restores smooth shifting.
  • APPLICATION RANGE: Our leak stop fluid is formulated to prevent and restore smooth shifting in vehicles with high mileage. Trans-X is not compatible with CVT or manual transmissions.
  • SAFE HANDLING: Highly flammable transmission stop slip must be stored in a well-ventilated place away from heat, sparks, and open flame. Wear appropriate personal protective equipment such as safety glasses and gloves.
  • PRODUCT SPECIFICATIONS: Trans-X High Mileage Transmission Fluid is available with 16 Fl Oz fill.
No. 10
ATP Automotive AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle
  • Professional strength fast acting resealer, stops leaks fast
  • Rejuivinates all rubber seals & gaskets in engines, transmissions, power steering, differentials and hydraulic systems
  • Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
  • Does not contain petroleum distillates, will not over-swell or breakdown seals
  • 8oz bottle will treat a 6 quart capacity, adjust accordingly
SaleNo. 11
Friction Modifier Positraction Additive for Limited Slip Differentials
  • Positraction additive
  • For use in any clutch-style limited slip
  • Compatible with most mineral and synthetic oils
  • Positraction Limited Slip Differential Additive
No. 12
Triax DSG-DCT ATF Dual Clutch Full Synthetic, Lifetime Fill, for All Dual Clutch Transmissions, High Performance Speed Shift with SureShift No Slip Additive (1 Qt)
  • 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
  • Extremely long fluid life (300,000 miles or more) and qualifies for lifetime fill unless otherwise specified by OEM
  • Flawless shifting characteristics and zero slippage; total compatibility with all types of seal materials; remains fluid down to -60F temperatures
No. 13
Lucas Oil 10441 Automatic Transmission Fluid Conditioner - 20 Ounce
  • Improves shifting
  • Extends fluid life
  • AFFORDABLE SOLUTIONS
  • Reduces noise and shudder
SaleNo. 14
Lubegard 67010 CVT Recharge & Protect, 10 fl. oz.
  • For use in all CVT transmissions
  • Corrects and prevents problems caused by worn-out, degraded fluid
  • Reduces noise
  • Provides anti-shudder durability
  • Protects belt/chain, pulleys and other components from excessive wear
  • Reduces foaming to maintain proper fluid pressure and flow
  • Maintains belt traction
  • Lubricates and protects seals without shrinking or swelling them
No. 15
Fluid Pump for Quart Bottles - Transfer Gear Oil, Transmission and Differential Fluid with This 8cc Hand Pump with 28mm Bottle Cap (Not Fit for Red Line Quarts!)
5 Consomer Reviews
Fluid Pump for Quart Bottles - Transfer Gear Oil, Transmission and Differential Fluid with This 8cc Hand Pump with 28mm Bottle Cap (Not Fit for Red Line Quarts!)
  • 【Multiple Applications】This transmission fluid pump fits standard quart bottles come with 28mm bottle cap,with an 8cc per pump stroke capacity. Suitable for dozens of uses including oil changes, siphoning gasoline, and transferring a wide range of fluids such as engine oil, biodiesel, kerosene, or shampoo,detergent.
  • 【Widely Used】The liquid transfer pump is suitable for the maintenance of automobile car, truck, RV, boat, motorcycles, and other daily applications.
  • 【Long And Short Suction Tubes】Suitable For Tall Or Short Quart Bottles.Ensuring broad usability.
  • 【Function】Safe Transfer. Enables precise fluid transfer between containers, or from container to engine, cooling system, and more.
No. 16
VEVOR Transmission Fluid Pump 2 Way Manual ATF Refill System Dispenser, Oil and Liquid Extractor 10 Liter Large Capacity, Automatic Transmission Fluid Pump Tool Set with 14 Pieces ATF Filler Adapters
  • 10L Large Capacity: Our pneumatic ATF pump has a 10L large capacity. It provides an easy way to extract and dispense transmission fluid quickly and cleanly. It's an ideal tool for oil replacement.
  • GREAT COMPATIBILITY: The fluid transfer pump comes with 14 common adapters that fit a variety of automobiles, including famous cars like BMW, Porsche, VW, Honda, Audi and many others.
  • Dual Control Mechanism: The fluid pump's dual control system with two-way valves (blue screw knob and flow direction valve) allows easy conversion between oil extracting and dispensing.
  • Ultra-secure Design: It includes a gauge for pressure monitoring and a releasing valve ( preset 43PSI ) to release pressure when it is overloading, this eliminates any potential threats at work.
  • Corrosion Resistance: Our transmission fluid pump is made of corrosion-resistance material, and it can withstand high pressure and also easy to wash.
No. 17
ATP Automotive AT-203 ATF Friction Modifier Synthetic Transmission Additive
  • Converts Dex / Merc ATF to a highly friction modified fluid
  • Provides compatibility with Chrysler ATF +3/+4, Honda Z1, Toyota Type T, Mitsubishi Diamond & Nissanmatic
  • Incorporates synthetics to improve transmission performance, reduce heat and wear
  • Blends with fluid for immediate effectiveness
  • 10oz bottle to treat one transmission
No. 18
ATP Automotive AT-202 ATF Protectant Synthetic Transmission Additive
  • Synthetic formula protects transmission by reducing internal heat & wear
  • Resists fluid thermal breakdown, oxidation, varnish and sludge
  • Improves shift quality and performance in normal to severe duty conditions
  • Eliminates TQ converter shutter and clutch pack chatter, blends with fluid for immediate effectiveness
  • Compatible with all automatic transmissions and 4x4 transfer cases
No. 19
XADO EX120 Manual Transmission Fix - Treatment for Stick Shift Gearboxes, Transfer Cases & Differentials | Friction Modifier Additive - Repairs Sticking, Shudder and Slipping
  • Repairs Scratches and Damaged Working Surfaces - Improves Operation Of Synchronizers
  • Increases Gear Contact Efficiency - Resulting in Better Gear Shifting Accuracy
  • Works with Manual & Direct shift, Robotized Gear Boxes, Transfer Cases & Differentials
  • Reduces Noise And Vibrations. Stops Slipping and Hard Shifting
  • If There Is a Heavy Transmission Fluid Leakage - Transmission Will Still Work Up To 600 Miles
SaleNo. 20
Lucas Oil 10052 Semi-Synthetic Sure-Shift Automatic Transmission Fluid - 1 Quart
  • Product Type:Auto Accessory
  • Item Package Dimensions:10.921 cm L X 12.953 cm W X 5.842 cm H
  • Item Package Weight:1.95 lbs
  • Country Of Origin: United States

How to choose a good automotive transmission additives

Does the idea of finding a fantastic automotive transmission additives make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in automotive transmission additives. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top automotive transmission additives products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top automotive transmission additives on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top automotive transmission additives brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top automotive transmission additives based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the automotive transmission additives were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good automotive transmission additives, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your automotive transmission additives.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting automotive transmission additives for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our automotive transmission additives. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what automotive transmission additives should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on automotive transmission additives.