20 Best Transmission Additive For High Mileage (2022 Updated)

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Transmission additive for high mileage is a product that is added to your transmission fluid in order to help protect and extend the life of your transmission.

20 Best Transmission Additive For High Mileage

Product Image Product Name Features Price

Bar's Leaks 1400 Transmission Repair

  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise

Lucas Oil 10441 Automatic Transmission Fluid Conditioner – 20 Oz.

  • Improves shifting
  • Reduces noise and shudder
  • Compatible with all automatic transmission fluids, conventional and synthetic

Rislone 4502 Transmission Stop Slip with Leak Repair – 32 oz.

  • Restores performance
  • Quiets noise
  • Stops leaks

Lucas Transmission Fix – 24 Ounce (Case of 12)

  • Great for eliminating most seal leaks
  • Works in all transmissions
  • Country of Origin: United States

Prolong Super Lubricants Psl15000 Transmission Treatment – 8 oz.

  • Includes a Formula with Anti-Friction Metal Treatment Technology
  • Features Engineering Designed to Treat Metal Surfaces Through a Molecular and Chemical Process

Castrol Transmax Vehicle Oils – 32 fl oz bottle

  • 1 Quart

Lubegard Highly Friction Modified ATF Supplement – 10 oz

  • Transmissions perform more efficiently at lower operating temperatures
  • Prevents overheating, Assists in freeing hung-up governors, Keeps valves free

Liqui Moly 20040 ATF Additive , 250 mL, 5135

  • Prevents oil loss
  • Regenerates seals, cleans and protects
  • Improve steering characteristic and reduced the noise

Lucas 10009 Transmission Fix 24 oz

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

Lucas Transmission Fix – 24 fl oz

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

K&W 402916×6 Trans-X High Mileage Automatic Transmission Treatment – 16 fl oz

  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.

K&W Trans-X High Mileage Automatic

  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.

ATF CONDITIONER/12X1/ 20 Ounce

  • Case of (12) 20 Ounce Bottles
  • Improves Shifting
  • Extends Fluid Life

Lubegard 63010 Platinum Universal ATF Protectant

  • 10 oz.

Lucas Synthetic Oil Stabilizer – 32 fl oz bottle

  • Light enough for an import and tough enough for a semi.
  • Eliminates noise and wear associated with today’s light weight motor oils.

Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon

  • Additional seal conditioners to prevent or help stop leaks
  • Extra cleaning agents to reduce varnish and sludge formulation

Liqui Moly 20040 – ATF Additive

  • Content: 250ml
  • Optimally cares for rubber and plastic seals in steering gears and automatic transmissions
  • Leaks on transmissions and gears, caused by hardened and brittle seals, are prevented and eliminated

Super Tech High Mileage Automatic Transmission Fluid – 1 qt

  • Formulated with a unique combination of premium base oils and an enhanced additive system including seal conditioners and shear stable modifiers
Bar's Leaks 1400 Transmission Repair
  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise
Lucas Oil 10441 Automatic Transmission Fluid Conditioner – 20 Oz.
  • Improves shifting
  • Reduces noise and shudder
  • Compatible with all automatic transmission fluids, conventional and synthetic
Rislone 4502 Transmission Stop Slip with Leak Repair – 32 oz.
  • Restores performance
  • Quiets noise
  • Stops leaks
Lucas Transmission Fix – 24 Ounce (Case of 12)
  • Great for eliminating most seal leaks
  • Works in all transmissions
  • Country of Origin: United States
Prolong Super Lubricants Psl15000 Transmission Treatment – 8 oz.
  • Includes a Formula with Anti-Friction Metal Treatment Technology
  • Features Engineering Designed to Treat Metal Surfaces Through a Molecular and Chemical Process
Castrol Transmax Vehicle Oils – 32 fl oz bottle
  • 1 Quart
Lubegard Highly Friction Modified ATF Supplement – 10 oz
  • Transmissions perform more efficiently at lower operating temperatures
  • Prevents overheating, Assists in freeing hung-up governors, Keeps valves free
Liqui Moly 20040 ATF Additive , 250 mL, 5135
  • Prevents oil loss
  • Regenerates seals, cleans and protects
  • Improve steering characteristic and reduced the noise
Lucas 10009 Transmission Fix 24 oz
  • Contains no solvents
  • Lowers operating temperatures and stops foaming
  • Can be added to existing fluid without draining any out
Lucas Transmission Fix – 24 fl oz
  • Contains no solvents
  • Lowers operating temperatures and stops foaming
  • Can be added to existing fluid without draining any out
K&W 402916×6 Trans-X High Mileage Automatic Transmission Treatment – 16 fl oz
  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.
K&W Trans-X High Mileage Automatic
  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.
ATF CONDITIONER/12X1/ 20 Ounce
  • Case of (12) 20 Ounce Bottles
  • Improves Shifting
  • Extends Fluid Life
Lubegard 63010 Platinum Universal ATF Protectant
  • 10 oz.
Lucas Synthetic Oil Stabilizer – 32 fl oz bottle
  • Light enough for an import and tough enough for a semi.
  • Eliminates noise and wear associated with today’s light weight motor oils.
Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon
  • Additional seal conditioners to prevent or help stop leaks
  • Extra cleaning agents to reduce varnish and sludge formulation
Liqui Moly 20040 – ATF Additive
  • Content: 250ml
  • Optimally cares for rubber and plastic seals in steering gears and automatic transmissions
  • Leaks on transmissions and gears, caused by hardened and brittle seals, are prevented and eliminated
Super Tech High Mileage Automatic Transmission Fluid – 1 qt
  • Formulated with a unique combination of premium base oils and an enhanced additive system including seal conditioners and shear stable modifiers

1. Bar’s Leaks 1400 Transmission Repair

Bar's Leaks 1400 Transmission Repair

  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise
  • Stops leaks
  • Conditions seals and o-rings

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Product Details

Specifications

Details
Assembled Depth (in) 1.8 in
Assembled Height (in) 8.4 in
Assembled Width (in) 3.6 in
Assembled Weight (lbs) 1 lbs
Excluded Ship States No

Reviews From Real Customers

Abstract

2. Lucas Oil 10441 Automatic Transmission Fluid Conditioner – 20 Oz.

Lucas Oil 10441 Automatic Transmission Fluid Conditioner - 20 Oz.

  • 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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Christopher Schippers
Shariyf

3. Rislone 4502 Transmission Stop Slip with Leak Repair – 32 oz.

Rislone 4502 Transmission Stop Slip with Leak Repair - 32 oz.

  • Restores performance
  • Quiets noise
  • Stops leaks
  • Stops slipping and prevents lazy shifting
  • Conditions seals and prevents future leaks

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Advance Auto Parts

Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions One bottle will treat 12 to 16 qt of transmission fluid. For compact and smaller vehicles, use 1/2 of the bottle. For severe problems or badly worn transmissions, use double the dosage or a second bottle.
Information Effective Date 2011-10-18 12:00:00
Package Weight 2
Package Weight UOM LB

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ProspectiveAutomotiveLLC

4. Lubegard Automatic Transmission Fluid Protectant – 10 fl oz bottle

 Lubegard Automatic Transmission Fluid Protectant - 10 fl oz bottle

  • Prevents Overheating, Reducing Elevated Operating Temperatures Up To 40 degrees Fahrenheit
  • Only Product That Increases The Fluids Ability To Transfer Heat
  • Reduces Differential Temperatures
  • Does Not Contain Harmful Chemicals Such As Zinc
  • Anti-Chatter In Clutch Packs (Allow Overnight Penetration For Maximum Benefit)

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Specifications

Details
Container Size 10 fl oz (US)
Contents (1) Bottle
SDS Required Yes

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heres2u
Mikkydee

5. Lucas Transmission Fix – 24 Ounce (Case of 12)

Lucas Transmission Fix - 24 Ounce (Case of 12)

  • Great for eliminating most seal leaks
  • Works in all transmissions
  • Country of Origin: United States
  • Model Number: 10009

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Product Details

Specifications

Details
Product Dimensions 13.75 x 10.38 x 10.38 inches
Country of Origin USA
Is Discontinued By Manufacturer No

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howardl610
jaramoor0
zbandit63-7

6. Prolong Super Lubricants Psl15000 Transmission Treatment – 8 oz.

Prolong Super Lubricants Psl15000 Transmission Treatment - 8 oz.

  • 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

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Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Item is Shipped at this Packaging Level Y
Information Effective Date 4/22/2010 12:00:00 AM
Packaging Depth 1.5 IN
Packaging Height 8.12 IN

7. Castrol Transmax Vehicle Oils – 32 fl oz bottle

Castrol Transmax Vehicle Oils - 32 fl oz bottle

  • 1 Quart

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Product Details

Specifications

Details
Units in Package 1
Unit Size 1 qt
Directions Don’t pollute. Conserve resources. Return used oil to collection centers.
Warnings Avoid prolonged contact. Wash skin thoroughly with soap and water. Launder or discard soiled clothes. Keep out of reach of children.

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Audeamus328
HughK

8. Lubegard Highly Friction Modified ATF Supplement – 10 oz

Lubegard Highly Friction Modified ATF Supplement - 10 oz

  • Transmissions perform more efficiently at lower operating temperatures
  • Prevents overheating, Assists in freeing hung-up governors, Keeps valves free
  • Provides for smoother shifting and reduces drive train power losses, Helps modify harsh shifts and makes them quicker in duration

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Product Details

Specifications

Details
Product Dimensions 25 x 13 x 1 inches
Country of Origin USA
Is Discontinued By Manufacturer No

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ex-farmer
CarTalkEnthusiast
jfmmck2

9. Liqui Moly 20040 ATF Additive , 250 mL, 5135

Liqui Moly 20040 ATF Additive , 250 mL, 5135

  • 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

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Amazon.com – Seller

Product Details

Specifications

Details
Product Dimensions 38.43 x 10.24 x 9.92 inches
Country of Origin Germany
Is Discontinued By Manufacturer No
OEM Part Number 5135

Reviews From Real Customers

bullfr2366
full_of_power
mtm2020

10. Lucas 10009 Transmission Fix 24 oz

Lucas 10009 Transmission Fix 24 oz

  • Contains no solvents
  • Lowers operating temperatures and stops foaming
  • Can be added to existing fluid without draining any out
  • Size : 24 Ounce

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Specifications

Details
Weight 2 oz

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ontheflag18
jonben8

11. Lucas Transmission Fix – 24 fl oz

Lucas Transmission Fix - 24 fl oz

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

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Product Details

Specifications

Details
Units in Package 1
Unit Size 24 fl oz
Directions A Perfect Preventative Maintenance Product: For extended transmission life and heat control, add one bottle of Lucas Transmission Fix with each fluid change (approximately 30,000 miles; please refer to owner’s manual). Renews Worn Transmission Fluid: Add to existing transmission fluid with engine warm and idling or with fluid change. A second bottle may be necessary in larger or badly worn transmissions. Smaller transmissions (compact or sub-compact vehicles) use 12 oz.
Warnings Keep out of reach of children.

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Eddie The 2001 Honda Accord Driver
elpistole

12. K&W 402916×6 Trans-X High Mileage Automatic Transmission Treatment – 16 fl oz

K&W 402916x6 Trans-X High Mileage Automatic Transmission Treatment - 16 fl oz

  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.
  • Restores smooth shifting.
  • Not compatible with CVT transmission fluids.

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Advance Auto Parts
MechanicSurplus.com

Product Details

Specifications

Details
Dimensions 9.5×3.8×1.5 inches

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AlChip

13. K&W Trans-X High Mileage Automatic

K&W Trans-X High Mileage Automatic

  • Developed for vehicles with 75,000 miles or more.
  • High tech formula extends transmission life.
  • Stops & prevents leaks.
  • Restores smooth shifting.
  • Not compatible with CVT transmission fluids.

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Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Packaging Depth 2.81 IN
Packaging Height 7.63 IN
Packaging Width 2.81 IN
Package Weight 1.2

Reviews From Real Customers

bnreggie
Mattszcz

14. ATF CONDITIONER/12X1/ 20 Ounce

ATF CONDITIONER/12X1/ 20 Ounce

  • Case of (12) 20 Ounce Bottles
  • Improves Shifting
  • Extends Fluid Life
  • Reduces Noise & Shudder
  • Extends Automatic Transmission Life

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Product Details

Specifications

Details
Assembled Product Weight 1.3 Pounds
Assembled Product Dimensions (L x W x H) 9.00 x 3.80 x 2.10 Inches

15. New Lucas Oil LUC10009 Transmission Fix, 24 Oz,Each

New Lucas Oil LUC10009 Transmission Fix, 24 Oz,Each

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willnash2011
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16. Lubegard 63010 Platinum Universal ATF Protectant

Lubegard 63010 Platinum Universal ATF Protectant

  • 10 oz.

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Details
Weight 0.95 lb

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ainserve1
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mrags80

17. Lucas Synthetic Oil Stabilizer – 32 fl oz bottle

Lucas Synthetic Oil Stabilizer - 32 fl oz bottle

  • Light enough for an import and tough enough for a semi.
  • Eliminates noise and wear associated with today’s light weight motor oils.
  • Use with synthetic and non-synthetic oils.
  • Cuts internal friction for more power and adds needed lubricity to any oil.

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Product Details

Specifications

Details
Product Type Oil stabilizer
Size 32 oz.
Product Weight 2.03 lb
Dimensions L x W x H (in.) 3.30 x 3.30 x 11.75 in

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BigPapaBear

18. Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon

Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon

  • Additional seal conditioners to prevent or help stop leaks
  • Extra cleaning agents to reduce varnish and sludge formulation
  • Protects against clutch wear
  • Restores smooth shifting

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Product Details

Specifications

Details
Assembled Product Weight 23.59 lbs
Assembled Product Dimensions (L x W x H) 8.31 x 4.56 x 11.04 Inches

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Mordecai

19. Liqui Moly 20040 – ATF Additive

Liqui Moly 20040 - ATF Additive

  • Content: 250ml
  • Optimally cares for rubber and plastic seals in steering gears and automatic transmissions
  • Leaks on transmissions and gears, caused by hardened and brittle seals, are prevented and eliminated
  • The contents of 250 ml are sufficient for up to 8 l oil volume

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FCP Euro

Product Details

Specifications

Details
Length 9.5 in
Height 2 in
Width 3 in
Weight 0.6 lb

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albert11albert11

20. Super Tech High Mileage Automatic Transmission Fluid – 1 qt

Super Tech High Mileage Automatic Transmission Fluid - 1 qt

  • Formulated with a unique combination of premium base oils and an enhanced additive system including seal conditioners and shear stable modifiers
  • Provides increased protection for higher mileage transmissions
  • Helps condition transmission seals to prevent leaks
  • Helps improve and maintain smooth shifting longer than conventional transmission fluids
  • Meets requirements for use in GM, Ford, Toyota, Mazda and other transmissions where DEXRON-II, DEXRON-III, and MERCON fluids are specified

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Specifications

Details
Assembled Product Weight 2 lb
Assembled Product Dimensions (L x W x H) 4.00 x 2.38 x 9.00 Inches

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Regnald
rskyhorse

Best Transmission Additive For High Mileage Buying Guides

vehicles

There are a few different types of additives that can be used in high mileage vehicles to help with transmission issues. One type of additive is a friction modifier, which helps to reduce the amount of friction between the moving parts in the transmission.

Another type of additive is a seal conditioner, which can help to condition the seals in the transmission and prevent leaks.

Introduction

vehicles

Transmission additives are designed to improve the performance of high mileage vehicles by reducing wear and tear on the transmission. By adding an extra layer of protection, they can help extend the life of your transmission and keep it running smoothly for longer.

The benefits of using a transmission additive for high mileage vehicles

One of the benefits of using a transmission additive for high mileage vehicles is that it can help to improve shift quality. In addition, it can also help to reduce transmission fluid leaks and can extend the life of the transmission.

The best transmission additive for high mileage vehicles

Transmission additives can improve the performance of high mileage vehicles by helping to restore hydraulic pressure, prevent leaks, and reduce wear. The best transmission additive for high mileage vehicles will depend on the specific needs of the vehicle, but some good options include Lucas Oil Heavy Duty Oil Stabilizer, Royal Purple Max-Gear Gear Oil Additive, and Red Line Synthetic Transmission Additive.

How to use a transmission additive for high mileage vehicles

If your car has over 75,000 miles on it, you might want to consider using a transmission additive. These additives help to keep your transmission fluid clean and can help to prevent leaks. They can also help to improve the shift quality of your transmission and make it last longer.

The precautions of using a transmission additive for high mileage vehicles

When using a transmission additive for high mileage vehicles, it is important to take the following precautions:

– First, check your vehicle’s transmission fluid level and quality. If the fluid is low, top it off. If the quality is poor, replace it.

– Next, consult your vehicle’s owner’s manual or a professional mechanic to see if your vehicle’s transmission is compatible with the additive.

– Once you have determined that the additive is compatible, follow the directions on the bottle. Usually, this involves adding the additive to your transmission fluid.

– Finally, keep an eye on your transmission fluid level and quality after using the additive. If you notice any deterioration, take your vehicle to a professional mechanic.

The conclusion

vehicles

The conclusion of transmission additive for high mileage vehicles is that they can help improve shifting, reduce leaks, and protect against wear and tear.

Conclusion

vehicles

The conclusion of transmission additive for high mileage vehicles is that it can help improve performance and extend the life of your transmission.

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