10 Best Transmission Additives 2020

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

After analyzing 943 products, scanning 4715 reviews, spending more than 36 hours of research and speaking with our test users, we think the LUCAS LUC10009 Transmission fix is the one of the Best Transmission Additive on the market.

LUCAS LUC10009 Transmission fix – Best Overall Transmission Additive

LUCAS LUC10009 Transmission fix

Lubegard 19610 Instant Shudder Fixx

Lubegard 19610 Instant Shudder Fixx
  • 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
  • Safe for use in ALL automatic transmissions except Ford Type F, CVT, and DCT
  • Voted top product by transmission professionals

Hot Shot's Secret HSSTSE32Z Transmission Restore Additive – Premium Pick

Hot Shot's Secret HSSTSE32Z Transmission Restore Additive
  • Reduces operating temperatures
  • Eliminates station from all automatic & CVT transmissions
  • Reduces coefficient of friction
  • Transmission station eliminator minimizes metal to metal contact
  • Eliminates rust & corrosion
  • Smooths out gear changes
  • 5 year shelf life

Lubegard 60902 Automatic Transmission Fluid Protectant – Best Budget Transmission Additive

Lubegard 60902 Automatic Transmission Fluid Protectant
  • 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

Lucas Oil 10441 20 Ounce Automatic Transmission Fluid Conditioner

Lucas Oil 10441 20 Ounce Automatic Transmission Fluid Conditioner
  • A Special Blend Of Lucas Additives Designed To Prevent Slipping, Leaks And Wear In Automatic Transmissions
  • Improves Shifting, Reduces Noise And Shudder, Extends Fluid Life
  • Through Creativity, Productivity And Innovation - This Brand Continues To Develop The Finest Automotive Accessories

Sea Foam 16 Ounce TT-16 Trans Tune Transmission Additive-16 oz

Sea Foam 16 Ounce TT-16 Trans Tune Transmission Additive-16 oz
  • 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

Liqui Moly 20040 ATF Additive

Liqui Moly 20040 ATF Additive
  • Prevents oil loss
  • Regenerates seals, cleans and protects
  • Improve steering characteristic and reduced the noise
  • Damps down shifting operations and protects from wear
  • Lowers repair costs and lengthens the service life

zMax 51-306 Transmission Formula

zMax 51-306 Transmission Formula
  • Reduced wear on vital parts
  • Improved performance
  • Improved shifting
  • Not for use in CVT transmissions

Prolong Super Lubricants PSL15000 Transmission Treatment

Prolong Super Lubricants PSL15000 Transmission Treatment
  • 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

Lubegard 63010 Platinum Universal ATF Protectant

Lubegard 63010 Platinum Universal ATF Protectant
  • The Original Universal ATF Protectant that Eliminates ATF Confusion and the need to stock multiple ATF's - Dramatically reduces friction and wear on metal parts and internal components
  • Will not alter the crucial sulfur balance in your transmission fluid, Prevents overheating, Will not harm yellow metals, Inhibits fluid oxidation and foaming
  • Contains patented Synergol TMS Technology, a synthetic molecule that tightens the shift cycle without losing the friction modification at lockup, which eliminates shudder
  • Extends fluid change intervals, Protects and restores seals for optimum performance, Conditions and restores seals and o-rings
  • Does not contain any harmful components such as zinc (ZDDP)/ash, etc., like other competing products, Frees stuck valves and keeps them free, Ensures proper shifts

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