10 Best Transmission Additives 2024

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

Lucas LUC10009 Transmission Fix 24 oz. – ⭐ Best Overall Transmission Additive

LUC10009 by LUCAS

  • Release date: 07/29/1999
  • Color: Brown
  • Weight: 1.58 pounds
  • Dimensions: 12 x 3.4 x 3.4 inches
Lucas LUC10009 Transmission Fix 24 oz.
  • 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

Lubegard 60902 Automatic Transmission Fluid Protectant – 💲 Best Budget Transmission Additive

60902 by Lubegard

  • Weight: 0.11 pounds
  • Dimensions: 7.4 x 3 x 1.8 inches
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

Hot Shot's Secret – 👑 Premium Pick

HSSTSE32Z by Hot Shot's Secret

  • Release date: 04/17/2015
  • Dimensions: 8.8 x 3.4 x 3.4 inches
  • Warranty: 100% Money Back Guarantee
Hot Shot's Secret
  • 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

LUCAS OIL 10441 Automatic Transmission Fluid Conditioner

10441 by Lucas Oil

  • Release date: 07/23/2012
  • Weight: 1.3 pounds
  • Dimensions: 7.1 x 3.8 x 2.1 inches
  • Warranty: Manufacturer Warranty
LUCAS OIL 10441 Automatic Transmission Fluid Conditioner
  • Improves shifting
  • Extends fluid life
  • Reduces noise and shudder

Lubegard 63010 Platinum Universal ATF Protectant

63010 by Lubegard

  • Weight: 0.65 pounds
  • Dimensions: 7.2 x 2.9 x 1.9 inches
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

Lubegard 19610 Instant Shudder Fixx

19610 by Lubegard

  • Color: Red
  • Dimensions: 5.5 x 1.2 x 1 inches
  • Warranty: Warranty, Parts:Parts
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
  • For use in any automatic transmission fluid (not for use in Ford Type F or CVT applications)
  • Voted top product by transmission professionals

Prolong Super Lubricants PSL15000 Transmission Treatment

PSL15000 by Prolong Super Lubricants

  • Release date: 10/25/2013
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

zMAX 51-306

51-306 by zMAX

  • Release date: 09/23/2015
  • Weight: 0.5 pounds
  • Dimensions: 3 x 3 x 5.5 inches
zMAX 51-306
  • PROTECT YOUR VEHICLE: zMAX Transmission Formula is easy to use! Micro-lubrication soaks into metal surfaces improving lubrication to reduce gear wear and varnish buildup. Keeps seals supple, preventing leaks and improving shifting.
  • TRANSMISSION EFFICIENCY: Improve performance by adding the formula to your transmission fluid to reduce slippage and rough shifting. Brings back smooth shifting gears resulting in an improved response. Add every time you change your transmission fluid.
  • TRANSMISSION LUBRICANT: Cleans varnish for smoother shifting and lubricates bearings, gears, and the hydraulic system. Perfect for both automatic or manual transmissions. Not for use in CVT transmissions. Does not void manufacturer's warranties.
  • ECONOMICAL PREVENTATIVE MAINTENANCE: Pour into transmission fluid to keep the gears lubricated and in top condition. The eco-friendly formula is industry tested, mechanic trusted and improves the performance and the driving experience.
  • TRUSTED QUALITY AND PERFORMANCE: zMAX is proud to be the Official Micro-lubricant of Speedway Motorsports. Trusted for over 80 years, the USA made Transmission Formula saves money at the pump and extends the engine life of all your vehicles.

Liqui Moly 20040 ATF Additive

5135 by Liqui Moly

  • Release date: 08/11/2014
  • Weight: 0.06 pounds
  • Dimensions: 38.4 x 10.2 x 9.9 inches
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

XADO Revitalizant EX120 Conditioner for Automatic Gearbox & CVT Tiptronic

XA 12031 by XADO

  • Weight: 0.02 pounds
XADO Revitalizant EX120 Conditioner for Automatic Gearbox & CVT Tiptronic
  • 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

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