Transmission fluids are vital for the operation and longevity of vehicle transmissions. They serve as lubricants, coolants, and power transfer mediums in various types of transmissions. Here’s a guide to some common transmission fluid types and their typical applications in car makers.


These are typically used in older vehicles and are less common in modern applications. They are suitable for certain Daihatsu models1.


Designed for continuously variable transmissions (CVT), these fluids are used in vehicles that require smoother, step-less gear transitions. They are found in certain Daihatsu and Suzuki models23.

ATF (Automatic Transmission Fluid)

This is a general term for fluids used in automatic transmissions. Specific types include:

ATF 6 HP: Suitable for vehicles requiring low-viscosity ATF, often used in modern automatic transmissions4.

ATF ATF+4: Formulated for Chrysler vehicles, including Dodge, Plymouth, Eagle, and certain Jeeps, Mitsubishi, and Hyundai applications5.

ATF AW-1: Used in Aisin Warner transmissions found in various manufacturers, including some Fiat models6.

ATF D6: Compatible with Toyota’s WS specification and can be used in Toyota and Lexus vehicles7.

ATF Dexron HP: A high-performance fluid designed for General Motors vehicles equipped with Hydra-Matic 8L90 eight-speed automatic transmissions8.

ATF Dexron Series (II, III, IV, V, VI)

The Dexron series is a line of ATF specified by General Motors, with each subsequent number indicating a newer version of the fluid. Dexron VI is the latest standard for GM vehicles9.


JASO (Japanese Automotive Standards Organization) fluids are designed to meet the specifications set by this body and are used in various Japanese vehicles.

ATF JWS Series

These are fluids specified by Japanese car manufacturers like Toyota and Nissan. For example, ATF JWS 3309 is used in some Volvo models4.

ATF Matic Series

The Matic series of fluids are typically used in Nissan and Infiniti vehicles.

ATF Mercon Series

Mercon fluids are specified by Ford for use in their vehicles. Mercon V is a common type for Ford and some European car makers4.

ATF Type Series

These fluids are often manufacturer-specific. For example, ATF Type F is associated with older Ford vehicles.

ATF WS (World Standard)

This is a fluid used in newer Toyota and Lexus vehicles7.

CVT Fluid Series

These fluids are designed for use in continuously variable transmissions, which require different properties compared to traditional automatic transmission fluids.

DCT (Dual Clutch Transmission)

DCT fluids are used in dual-clutch transmissions, which are a type of semi-automatic or automated manual transmission.

It’s important to use the correct type of transmission fluid specified by the vehicle manufacturer to ensure proper function and avoid damage. Always refer to the vehicle’s owner’s manual or consult with the manufacturer for the recommended fluid type. If you’re unsure, it’s best to use the fluid specified by the car maker to maintain warranty and ensure compatibility. 

When to Consult a Professional:

If you're unsure about the right transmission oil for your car, don't hesitate to consult a qualified mechanic at GariParts service department. We can help you identify the correct oil based on your vehicle's specifications and ensure smooth gear changes for miles to come.

 By understanding the different types of transmission oil and their uses, you can make informed decisions about maintaining your car's transmission and ensure a pleasant driving experience.

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