20 Best Transmission Additives [2024]

Are you looking for the best transmission additives? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling transmission additives.

We Recommended:

# Preview Product
1 Lucas LUC10009 Transmission Fix 24 oz., Brown (Packaging May Vary) , White Lucas LUC10009 Transmission Fix 24 oz., Brown (Packaging May Vary) , White
2 Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack
3 Bar's Leaks 1416 Super Transmission Fix - 16.9 oz. Bar's Leaks 1416 Super Transmission Fix - 16.9 oz.
4 Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
5 zMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon... zMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon...
6 Liqui Moly 20040 ATF Additive , 250 ML, 5135 Liqui Moly 20040 ATF Additive , 250 ML, 5135
7 XADO Atomic Metal Conditioner Maximum for аutomatic transmissions (Syringe 30ml) (Automatic... XADO Atomic Metal Conditioner Maximum for аutomatic transmissions (Syringe 30ml) (Automatic...
8 Lubegard 60902 Automatic Transmission Fluid Protectant, 10 oz Lubegard 60902 Automatic Transmission Fluid Protectant, 10 oz
9 Lubegard 19610 Instant Shudder Fixx, 2 oz. Lubegard 19610 Instant Shudder Fixx, 2 oz.
10 Rislone High Mileage Transmission Stop Slip with Leak Repair,Pack of 1,4502 Rislone High Mileage Transmission Stop Slip with Leak Repair,Pack of 1,4502
11 Lubegard 61910 Highly Friction Modified ATF Supplement, 10 oz. Lubegard 61910 Highly Friction Modified ATF Supplement, 10 oz.
12 XADO EX120 Automatic Transmission Fix - Treatment for CVT & Other Gearbox Types | ATF Additive &... XADO EX120 Automatic Transmission Fix - Treatment for CVT & Other Gearbox Types | ATF Additive &...
13 Bar's Leaks High Mileage Transmission Repair, 16.9 Fl Oz Bar's Leaks High Mileage Transmission Repair, 16.9 Fl Oz
14 LUCAS OIL 10441 Automatic Transmission Fluid Conditioner, 20 oz LUCAS OIL 10441 Automatic Transmission Fluid Conditioner, 20 oz
15 Liqui Moly 2019 MoS2 Anti-Friction Gear Lubricant - 50 Gram Liqui Moly 2019 MoS2 Anti-Friction Gear Lubricant - 50 Gram
16 Sea Foam Trans Tune TT16, 16 oz Sea Foam Trans Tune TT16, 16 oz
17 Prolong Super Lubricants PSL15000 Transmission Treatment - 8 oz. Prolong Super Lubricants PSL15000 Transmission Treatment - 8 oz.
18 Lubegard 67010 CVT Recharge & Protect, 10 fl. oz. Lubegard 67010 CVT Recharge & Protect, 10 fl. oz.
19 K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment - 16 Fl Oz Leak Repair Solution... K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment - 16 Fl Oz Leak Repair...
20 BG ATC Plus BG ATC Plus
Bestseller No. 1
Lucas LUC10009 Transmission Fix 24 oz., Brown (Packaging May Vary) , White
  • Lucas Transmission Fix Stops Slip, Hesitation, Rough Shifting In Worn Transmissions And Completely Eliminates Most Seal Leaks
  • Fit Type: Universal
  • Can be added to existing fluid without draining any out
  • Improves shifting
Bestseller No. 2
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
Bestseller No. 3
Bar's Leaks 1416 Super Transmission Fix - 16.9 oz.
  • Stop Slipping, Rough Shifting, & Seals Fluid Leaks
  • Works in all Automatic, Manual, CVT, & Dual Clutch Transmissions
  • Reduces Noise
  • Renews Worn Bands
  • Bar's Leaks Super Transmission Fix is a synthetic blend treatment for transmission fluid, seals, metal surfaces, bands and clutch plates.
SaleBestseller No. 4
Hot Shot's Secret - HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
  • Hot Shot's Secret Shift Restore is engineered to safely dissolve the harmful gum and varnish that forms over time on the surface of precision...
  • Reduces transmission operating temperatures with high performance ester formula
  • Our Shift Restore formula acts as a high-quality transmission lubricant that serves as a hydraulic fluid, lubricating fluid and heat transfer fluid;...
  • Shift Restore's formula is designed to instantly attach itself to all of your transmission's metal parts, preventing deposits from varnish and...
  • Reduces transmission wear, erratic and inconsistent shifting, hesitation and rough operation, and excessive noise and vibration
Bestseller No. 5
zMAX 51-306 - Transmission Formula - for Automatic and Manual Transmissions - Reduces Carbon...
  • PROTECT YOUR VEHICLE: zMAX Transmission Formula is easy to use! Micro-lubrication soaks into metal surfaces improving lubrication to reduce gear wear...
  • TRANSMISSION EFFICIENCY: Improve performance by adding the formula to your transmission fluid to reduce slippage and rough shifting. Brings back...
  • TRANSMISSION LUBRICANT: Cleans varnish for smoother shifting and lubricates bearings, gears, and the hydraulic system. Perfect for both automatic or...
  • ECONOMICAL PREVENTATIVE MAINTENANCE: Pour into transmission fluid to keep the gears lubricated and in top condition. The eco-friendly formula is...
  • TRUSTED QUALITY AND PERFORMANCE: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Trusted for over 80 years, the USA made...
SaleBestseller No. 6
Liqui Moly 20040 ATF Additive , 250 ML, 5135
  • Improves shifting of transmissions
Bestseller No. 7
XADO Atomic Metal Conditioner Maximum for аutomatic transmissions (Syringe 30ml) (Automatic...
  • Repair Transmission
  • Restores Surfaces and Protects Friction Metal Parts From Wear
  • Eliminates Surface Defects
  • Increases Performance Reliability and Prolongs Service Life Span of Control Mechanisms
  • Reduces Noise and Vibrations
Bestseller No. 8
Lubegard 60902 Automatic Transmission Fluid Protectant, 10 oz
  • Prevents overheating, reducing elevated operating temperatures up to 40 degrees Farenheit - Optimizes total transmission performance
  • Eliminates transmission fluid foaming and oxidation and reduces wear throughout the transmission
  • Eliminates clutch chatter and torque converter shudder; Softens and modifies harsh shifts making them quicker in duration
  • Extends fluid life / Raises the thermal and oxidative stability of the fluid
  • Only protectant that increases the fluid’s ability to transfer heat / Protects new seals and permanently restores older seals to a like-new...
Bestseller No. 9
Lubegard 19610 Instant Shudder Fixx, 2 oz.
  • 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
Bestseller No. 10
Rislone High Mileage Transmission Stop Slip with Leak Repair,Pack of 1,4502
  • Restores performance
  • Quiets noise
  • Stops leaks
  • Stops slipping and prevents lazy shifting
  • Conditions seals and prevents future leaks
SaleBestseller No. 11
Lubegard 61910 Highly Friction Modified ATF Supplement, 10 oz.
  • Converts DEXRON II, III / MERCON ATF into a Highly Friction Modified ATF - Transmissions perform more efficiently at lower operating temperatures
  • Anti-chatter in clutch packs (allow penetration overnight for maximum benefit), Anti-shudder with converter clutches (allow penetration overnight for...
  • Prevents overheating, Assists in freeing hung-up governors, Keeps valves free
  • Provides for smoother shifting and reduces drive train power losses, Helps modify harsh shifts and makes them quicker in duration
  • Maintains proper ATF viscosity in torque converters, Inhibits transmission fluid foaming and oxidation, thereby extending fluid life and Reduces...
Bestseller No. 12
XADO EX120 Automatic Transmission Fix - Treatment for CVT & Other Gearbox Types | ATF Additive &...
  • Rebuilds And Restores Metal Parts And Protects Them From Future Wear.
  • Anti Friction Modifier. Eliminates Surfaces Defects & Protects From Extreme Heat
  • Stops Transmission Shudder, Reduces Noise & Vibration. Ultimate Stop Slipping Additive
  • Increases Performance Reliability And Prolongs Service Life Of Control Gears
  • Universal for Automatic, CVT, Tiptronic, Manumatic, Semi-Automatic Transmission
Bestseller No. 13
Bar's Leaks High Mileage Transmission Repair, 16.9 Fl Oz
  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise
  • Stops leaks
  • Conditions seals and o-rings
Bestseller No. 14
LUCAS OIL 10441 Automatic Transmission Fluid Conditioner, 20 oz
  • Improves shifting
  • Extends fluid life
  • AFFORDABLE SOLUTIONS
  • Reduces noise and shudder
Bestseller No. 15
Liqui Moly 2019 MoS2 Anti-Friction Gear Lubricant - 50 Gram
  • Package Dimensions: 1.778 cms (L) x 2.794 cms (W) x 1.778 cms (H)
  • Product Type: Auto Accessory
  • Package Quantity: 1
  • Country Of Origin: Germany
Bestseller No. 16
Sea Foam Trans Tune TT16, 16 oz
  • Helps fluid systems work smoother and last longer
  • Dissolves and liquefies harmful gum and varnish buildup in fluid
  • Cleans and lubricates valve bodies, shift actuators and solenoids, controls moisture
  • Safe in most types of automatic transmission fluid, hydraulics, or power steering fluid systems
  • Safe for conventional and synthetic fluids
SaleBestseller No. 17
Prolong Super Lubricants PSL15000 Transmission Treatment - 8 oz.
  • Includes a Formula with Anti-Friction Metal Treatment Technology
  • Features Engineering Designed to Treat Metal Surfaces Through a Molecular and Chemical Process
  • Offers Molecules that Interact with Metal Surfaces and Chemically Bond to Create a Protective Layer that Reduces Damaging Friction and Heat
  • Offers to Treat the Metal Surfaces of Both Standard (Manual) and Automatic Transmissions
  • Features a Formula that Promotes Smoother Manual Shifts and Helps Restore Responsiveness in Automatic Transmissions
SaleBestseller No. 18
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
  • Protects belt/chain, pulleys and other components from excessive wear
  • Provides anti-shudder durability
SaleBestseller No. 19
K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment - 16 Fl Oz Leak Repair Solution...
  • 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...
  • TRANS-X LEAK REPAIR FLUID: Specially developed for vehicles with 75,000 miles or more, this automatic transmission fluid extends the transmission...
  • APPLICATION RANGE: Our leak stop fluid is formulated to prevent and restore smooth shifting in vehicles with high mileage. Trans-X is not compatible...
  • SAFE HANDLING: Highly flammable transmission stop slip must be stored in a well-ventilated place away from heat, sparks, and open flame. Wear...
  • PRODUCT SPECIFICATIONS: Trans-X High Mileage Transmission Fluid is available with 16 Fl Oz fill.
SaleBestseller No. 20
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.

Having trouble finding a great transmission additives?

This problem is well understood by us because we have gone through the entire transmission additives research process ourselves, which is why we have put together a comprehensive list of the best transmission additivess available in the market today.

After hours of searching and using all the models on the market, we have found the best transmission additives for 2023. See our ranking below!

How Do You Buy The Best Transmission Additives?

Do you get stressed out thinking about shopping for a great transmission additives? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching transmission additives, which is why we have assembled a comprehensive list of the greatest transmission additives available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for transmission additives that you consider buying. Your questions might include the following:

  • Is it worth buying an transmission additives?
  • What benefits are there with buying an transmission additives?
  • What factors deserve consideration when shopping for an effective transmission additives?
  • Why is it crucial to invest in any transmission additives, much less the best one?
  • Which transmission additives are good in the current market?
  • Where can you find information like this about transmission additives?

We’re convinced that you likely have far more questions than just these regarding transmission additives, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for transmission additives, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible transmission additives. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an transmission additives buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available transmission additives currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of transmission additives has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an transmission additives?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your transmission additives.
  5. Customer Ratings: Number ratings grade transmission additives objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their transmission additives.
  7. Product Quality: You don’t always get what you pay for with an transmission additives, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an transmission additives is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining transmission additives information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding transmission additives is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

FAQ:

Q: What is the best transmission slip additive?

A: – Petroleum based additive made of 3 blended oils – Flushes damaging varnish deposits and moisture from system – Can be used in power steering, agricultural & industrial hydraulic systems – Cleans and conditions without softening seals or O-rings – Compatible with all transmission flushing machines

Q: Do transmission fluid additives really work?

A: Yes, they work but not the way you want or hope they do. The stop leak additives do two things: the soften the seals and cause them to swell. It actually will cause every seal and gasket in the transmission to do this, and at some point it will stop the leak, temporarily. There is not anything to say the leak stopped ok no more.

Q: Are transmission additives any good?

A: Using a transmission additive will help reduce small leaks and put an end to corrosion since it conditions the seals. Transmission fluids can get contaminated over time and their consistency will change as a result. They become more sluggish and stop flowing smoothly.

Q: What is the best transmission treatment?

A: PROTECT YOUR VEHICLE: zMAX Transmission Formula is easy to use! … TRANSMISSION EFFICIENCY: Improve performance by adding the formula to your transmission fluid to reduce slippage and rough shifting. … TRANSMISSION LUBRICANT: Cleans varnish for smoother shifting and lubricates bearings,gears,and the hydraulic system. …

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