Below is the table which shows the top 6 best automatic transmission additive 2018. Each and every automatic transmission additive is chosen by our specialist reviewers.

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# 1 - Lucas Oil 10441 Automatic Transmission Fluid Conditioner - 20 Oz.

Formulated with the finest base oils and special Lucas additive package, Lucas Oil's Automatic Transmission Fluid Conditioner is designed to prevent slipping, leaks and wear to provide smooth, quiet operation while conditioning seals to extend the life of the transmission.


  • Improves shifting
  • Reduces noise and shudder
  • Compatible with all automatic transmission fluids, conventional and synthetic
  • Extends fluid life
  • For use in new and older transmission


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# 2 - Lubegard 19610 Dr. Tranny Instant Shudder Fixx, 2 Oz.

Instant Shudder Fixx Friction Modifier is the number one transmission instant shudder eliminator used by more professional transmission technicians. This is a five time concentrated friction modifier formulated specifically for eliminating transmission shudder problems instantly. In order to use it, the contents should be emptied directly into the ATF (automatic transmission fluid) via Filter Tube and then drive normally. The results will be immediate. instant shudder fixx is compatible with all conventional or synthetic automatic transmission fluids. It is for the best overall performance and long term transmission benefit. The Lubegard automatic transmission protectant is recommended to be used as…


  • 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


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# 3 - Sea Foam Tt-16 Trans Tune Transmission Additive - 16 Oz.

Trans Tune is a petroleum based product comprised of three specific oils, blended in just the right proportions to safely clean varnish deposits in transmission, power steering and hydraulic pump components. Trans Tune is compatible with all commonly used petroleum and synthetic based hydraulic fluids used in automatic transmissions, power steering systems, marine transmissions, agricultural equipment and industrial hydraulic lifts. Trans Tune reduces rough or erratic shifting by dissolving varnish that contaminates transmission valve bodies, bands, governors, pumps and passages. Trans Tune makes the perfect system flush for transmissions, power steering and hydraulic pumps, removing damaging moisture and deposits that…


  • Does not harm or swell seals or alter the viscosity of the transmission fluid
  • Reduces rough or erratic shifting
  • Removes damaging moisture
  • For automatic transmissions, power steering systems and industrial or agricultural hydraulic systems


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# 4 - Lucas Luc10009 Transmission Fix 24 Oz.

Stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance.Use also in light duty manual transmissions to increase shifting ease and transmission life. 12 per case.


  • Contains no solvents
  • Lowers operating temperatures and stops foaming
  • Can be added to existing fluid without draining any out


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# 5 - Lubegard 60902 Automatic Transmission Fluid Protectant, 10 Oz.

LUBEGARD AUTOMATIC TRANSMISSION FLUID (ATF) PROTECTANT is for use in all automatic transmissions and manuals requiring an ATF, including heavy duty transmissions, such as Allison. Use with all synthetic or mineral based DEXRON, MERCON & OEM (Original Equipment Manufacturers) ATF’s (except Ford Type F ATF & CVT applications). Lubegard controls heat and is especially effective in today’s hotter running front wheel drive vehicles. It contains LXE (Liquid Wax Ester) Technology and their derivatives, base oils and conventional additives. Lubegard is designed to raise the thermal and oxidative stability level of automatic transmission fluids, so when it operates at elevated temperatures,…


  • 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 condition, without adverse side effects