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In order to obtain the Best Transmission Fluid Additives (2021), our dynamic platforms and experts have taken many factors into account such as product fitness for use, features that meet buyers needs and give buyer satisfaction, freedom from deficiencies or defects, conformance of standards, value-for-money, dependability, level of design standards, quality conformance to needs and good practises, protection and safety, actual customer satisfaction and lots of others. It is of great importance to mention that each user has different requirements so please use the list below as a guideline and not as a gospel. Nevertheless, in the list below you can undoubtedly find the overall best ones despite your requirements.

Our brilliant platforms and professional high-tech experts work hard to identify the best product options. We firmly believe that that our review rankings can help you simplify your purchase decision and choose among the absolute Best Transmission Fluid Additives (2021).

Best Transmission Fluid Additives

Best Choice No. 1
Hot Shot’s Secret – HSSTSE32Z Shift Restore Automatic Transmission Additive 32 Fluid Ounce Bottle
  • 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
Best Choice No. 2
XADO Revitalizant EX120 Conditioner for Automatic Gearbox & CVT Tiptronic Transmission Oil Treatment Additive (Box, Syringe 8 ml) Protectant Fluid – Restore Your ATF Metal Parts from Wear (Automatic)
  • 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
Best Choice No. 3
LUBEGARD Lube Gard Automatic Transmission Fluid ATF Synthetic Additive Platinum 3 pack
  • 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
Best Choice No. 4
Muscle Metal Treatment MT-10 Transmission, 8 Fluid Ounces, Anti-Friction Lubricant Additive
  • MT-10 Transmission is an anti-friction additive designed to address extreme-pressure areas, such as planetary and worm gear systems, along with bushings, bearings and shafts
  • Polishes, seals and protects metal surface of internal, moving metal parts while lowering operating temperatures
  • Keeps oil passages, orifices, and ball checks clean and fully operational and frees valve body for optimum performance
  • Lubrication technology based on tribologic methods that improve lubricity and load carrying capacity
  • Compatible with all petroleum fluids and most synthetics; Contains no solid lubrcants, chlorinated solvents, or phosphate compounds
Best Choice No. 5
LUBEGARD Lube Gard Automatic Transmission Fluid ATF Synthetic Additive Red 60902 3 pack
  • 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
Best Choice No. 6
Genuine GM Fluid 88861314 Automatic Transmission Seal Conditioner – 11 oz.
  • Designed to stop minor leaks
  • Product contains seal swell
  • Additives used in formulating automatic transmission fluids
  • Use to prevent seepage of transmission fluid
  • Conditions seals in automatic transmissions
Best Choice No. 7
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.
Best Choice No. 8
zMAX 51-306 – Transmission Formula – for Automatic and Manual Transmissions – Reduces Carbon Build-Up – Lubricates Metal and Gears – Keeps Seals Supple – Improves Shifting Performance – 6 oz.
  • 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.
Best Choice No. 9
Honda FBA_08200-9008 08200-9008 Automatic Transmission Fluid, 4 Pack, 1 US QT /946 ML
  • Genuine Honda Transmission
  • Honda DW-1 Automatic Transmission Fluid, 1 quart, Pack of 4
  • Its wide viscosity range provides outstanding protection
Best Choice No. 10
LUCAS OIL 10441 Automatic Transmission Fluid Conditioner, 20 oz
  • Improves shifting
  • Extends fluid life
  • AFFORDABLE SOLUTIONS
  • Reduces noise and shudder

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