Top 10 Transmission Additives (July 2024)

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

LUC10009 by LUCAS

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

60902 by Lubegard

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

HSSTSE32Z by Hot Shot's Secret

10441 by Lucas Oil

63010 by Lubegard

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

19610 by Lubegard

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

PSL15000 by Prolong Super Lubricants

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

51-306 by zMAX

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.

5135 by Liqui Moly

XA 12031 by XADO

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